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Subhotosh Khan
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Subhotosh Khan
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Join Date
06-18-2007
Last Activity
Yesterday
09:31 PM
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Yesterday,
09:29 PM
Subhotosh Khan
replied to a thread
Animals
in
Arithmetic
Please share your work with us - how did you get those answers?
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3 replies | 25 view(s)
Yesterday,
01:53 PM
Subhotosh Khan
replied to a thread
Algebraic Fraction Help
in
Arithmetic
I had skipped mentioning \ x \ne \pm 1 - hoping that OP will catch that. At x=-1, the given function would have a removable discontinuity.
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5 replies | 54 view(s)
Yesterday,
11:25 AM
Subhotosh Khan
replied to a thread
Solve R
in
Calculus
Do you know Newton-Raphstone method of approximating roots of algebraic equations.
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1 replies | 28 view(s)
Yesterday,
09:59 AM
Subhotosh Khan
replied to a thread
o.k. here it goes
in
Pre-Algebra
Assume your total investment was = $100 Then you had total gain of $6.50 Your non-stock investment lost $2.50 So your $50 stock investment...
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1 replies | 34 view(s)
Yesterday,
09:50 AM
Subhotosh Khan
replied to a thread
Algebraic Fraction Help
in
Arithmetic
\displaystyle{\dfrac{x \ + \ 1}{1 \ - \ \frac{1}{x^2}}} I would first multiply numerator and denominator by x2 , assuming x \ne 0
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5 replies | 54 view(s)
Yesterday,
09:42 AM
Subhotosh Khan
replied to a thread
Limits of integration
in
Calculus
The first thing I would do is to approximately sketch the situation. z=x will be a plane that will contain the y-axis and the line z=x on x-z...
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1 replies | 19 view(s)
10-18-2018,
07:23 PM
Subhotosh Khan
replied to a thread
32 Fundemental Identites
in
Geometry and Trig
Do you know cos(90-Θ) = ?
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2 replies | 68 view(s)
10-18-2018,
07:42 AM
Subhotosh Khan
replied to a thread
How to calculate this tower
in
Arithmetic
How to calculate WHAT of the tower? What other information (besides the picture) is given to you?
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2 replies | 64 view(s)
10-17-2018,
03:33 PM
Subhotosh Khan
replied to a thread
How are different bases pronounced?
in
Arithmetic
Is eleventy-eleven allowed?!!
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13 replies | 168 view(s)
10-14-2018,
04:08 PM
Subhotosh Khan
replied to a thread
Bedmas Questions: Why does (3*5*10)/3 =/= 3*3^-1 * 5*3^-1 * 10*3^-1
in
Arithmetic
Do you know that: 5 * (2 * 3 * 4) \displaystyle{\ne} (5 * 2) * (5 * 3) * (5 * 4) ? Same logic - "multiplication" does NOT DISTRIBUTE among...
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6 replies | 181 view(s)
10-14-2018,
04:02 PM
Subhotosh Khan
replied to a thread
Rational expressions, eqns: If y is proportional to sqrt[x], y=6 when x= 1/4, then...
in
Intermediate/Advanced Algebra
Do you know that: If y is proportional to the square root of x, then you can write, y = k * (√x), where k is a constant (constant of...
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2 replies | 102 view(s)
10-14-2018,
12:36 PM
Subhotosh Khan
replied to a thread
Find root of e^x + x = 3 - x in interval [0, 1] using Newton-Raphson method
in
Calculus
Your problem could be translated to: Calculate the roots of w(x) = (e^x + x) - (3-x), using the Newton-Raphson Method in the interval to an...
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4 replies | 125 view(s)
10-14-2018,
12:14 PM
Subhotosh Khan
replied to a thread
Find root of e^x + x = 3 - x in interval [0, 1] using Newton-Raphson method
in
Calculus
Do you know Newton-Raphson Method ?
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4 replies | 125 view(s)
10-14-2018,
12:08 PM
Subhotosh Khan
replied to a thread
Limit Question: lim[x -> 0] [(e^x + e^{-x} - 2) / (1 - cos 2x)]
in
Calculus
Have you tried to apply L'Hospital's rule? You may have to apply it several times!
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3 replies | 119 view(s)
10-14-2018,
07:29 AM
Subhotosh Khan
replied to a thread
Laplace's Equation: d^2 T/dx^2 + d^2 T/dy^2 = 0
in
Differential Equations
First calculate the partial derivatives of the proposed solutions (functions) and then use those in the given differential Equation and see if the...
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2 replies | 93 view(s)
10-13-2018,
11:39 AM
Subhotosh Khan
replied to a thread
Ellipse and tangent intersect: x^2 / 9 + y^2 / 25 = 1
in
Intermediate/Advanced Algebra
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1 replies | 80 view(s)
10-13-2018,
10:22 AM
Subhotosh Khan
replied to a thread
Conic section, ellipse: x^2 / 4 + y^2 / 9 = 1 translated by vector [[a][b]] to get...
in
Intermediate/Advanced Algebra
First sketch those two ellipses. Join their centers - this is your translation vector. Now think......
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2 replies | 74 view(s)
10-13-2018,
10:19 AM
Subhotosh Khan
replied to a thread
Working out x on a vertical opposite angle
in
Geometry and Trig
The two adjacent angles here are (2x+30) and (3x-20). These are adjacent angles. What should be their sum?
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7 replies | 247 view(s)
10-13-2018,
10:06 AM
Subhotosh Khan
replied to a thread
Working out x on a vertical opposite angle
in
Geometry and Trig
When two st. lines intersect at point, it creates vertical opposite angles and adjacent angles. Do you recall any theorems regarding those...
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7 replies | 247 view(s)
10-13-2018,
07:30 AM
Subhotosh Khan
replied to a thread
Prove that Un = (2^n - (-1)^n)/3 is an odd number for all positive integers
in
Intermediate/Advanced Algebra
(2^(k+1) - (-1)^(k+1)) = 2 * 2^k + (-1)^k (2^(k+1) - (-1)^(k+1)) + (2^k - (-1)^k) = 3 * 2^k ....... divisible by 3
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2 replies | 85 view(s)
10-12-2018,
09:31 AM
Subhotosh Khan
replied to a thread
Integration: F(x) = integral [from b to a] [(1/3) x^3] dx
in
Calculus
What was your question?
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2 replies | 125 view(s)
10-12-2018,
09:28 AM
Subhotosh Khan
replied to a thread
Growth of four items to a approx equal
in
Finance/Business Math
Four lines may not meet at one point.
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3 replies | 142 view(s)
10-11-2018,
02:21 PM
Subhotosh Khan
replied to a thread
Work with averages: The mean weight of 9 players and 3 reserve players is 188 pounds.
in
Pre-Algebra
Did you post the complete problem? The information posted is not sufficient to answer the question.
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1 replies | 172 view(s)
10-10-2018,
11:00 AM
Subhotosh Khan
replied to a thread
Overestimating and Underestimating: A increases by 2 million while B decreases by 2 m
in
Probability / Statistics
What were the original sizes of A and B?
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4 replies | 125 view(s)
10-10-2018,
10:57 AM
Subhotosh Khan
replied to a thread
Probability: There is a 24.39% chance a company sells out this year....
in
Probability / Statistics
Is this part of a "bigger" question or it is the complete question? If it is part of a bigger question - please provide the complete question.
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4 replies | 148 view(s)
10-10-2018,
09:21 AM
Subhotosh Khan
replied to a thread
Function help! Given f(x) = 3k+2, find k so lim x->6 f(x) = f(6)
in
Calculus
As I understand your question: Given f(x) = 3k+2 find the value of k such that lim x->6 f(x) = f(6). However, (3k +2) is not a function of 'x'....
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9 replies | 234 view(s)
10-10-2018,
05:16 AM
Subhotosh Khan
replied to a thread
Mechanics and Materials Change in Length and Stress/Strain
in
Intermediate/Advanced Algebra
But in your OP you had said that: "The answer is 292mm ...." So according to your resources, you do NOT have the correct answer yet!!
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15 replies | 509 view(s)
10-09-2018,
11:03 AM
Subhotosh Khan
replied to a thread
Cone volume problem
in
Geometry and Trig
Which way - from base up(towards the apex) or from apex to base? I am assuming it is a right-circular cone. What is the volume of such cone when...
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1 replies | 48 view(s)
10-09-2018,
05:50 AM
Subhotosh Khan
replied to a thread
Mechanics and Materials Change in Length and Stress/Strain
in
Intermediate/Advanced Algebra
Did you get the part A correct?
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15 replies | 509 view(s)
10-08-2018,
04:49 AM
Subhotosh Khan
replied to a thread
Proof by mathematical induction: 1^2+42+7^2+10^2+13^2+...+(6n+1)^2=(2n+1)(12n^2+9n+ 1)
in
Beginning Algebra
There is something very wrong with your problem statement! That should be: (3*n-2)2 The expression for summed series is not correct for even...
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4 replies | 340 view(s)
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About Subhotosh Khan
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“... mathematics is only the art of saying the same thing in different words” - B. Russell
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Last Activity
Yesterday
09:31 PM
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06-18-2007
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