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Subhotosh Khan
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Subhotosh Khan
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Join Date
06-18-2007
Last Activity
Today
06:13 PM
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Today,
05:36 PM
Subhotosh Khan
replied to a thread
Sum of this sequence
in
Arithmetic
Do you know the sum of first 'n' terms in an arithmatic series with first term 'a' and common difference 'd'?
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8 replies | 83 view(s)
Today,
05:32 PM
Subhotosh Khan
replied to a thread
Need help with finding exact values
in
Geometry and Trig
Do you know the exact values of: tan(π/4) tan(π/3) tan(A+B) sin(45o)
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2 replies | 16 view(s)
Today,
12:42 PM
Subhotosh Khan
replied to a thread
Sum of this sequence
in
Arithmetic
Your expression needs to be corrected! You posted: a1 = 10 a_{} \ = \ a_{n-1} + 3 On the left-hand-side of the equation there is no refernce...
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8 replies | 83 view(s)
Today,
11:29 AM
Subhotosh Khan
replied to a thread
Understanding the idea behind.
in
Beginning Algebra
If you assume "time" to be discrete - then smallest unit of time is: Now you can stop reading tP seconds before 2:30 (AM ? PM? EST? GMT? ......
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2 replies | 57 view(s)
Today,
11:13 AM
Subhotosh Khan
replied to a thread
Demo Access to Future FMH Forum
in
News
No objection here......
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30 replies | 566 view(s)
Yesterday,
08:35 PM
Subhotosh Khan
replied to a thread
[Urgent] Need help with physics question
in
Intermediate/Advanced Algebra
Do you know the equation for volume of a cylinder (circular base) with height =h and diameter = D?
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4 replies | 85 view(s)
02-15-2019,
10:06 PM
Subhotosh Khan
replied to a thread
Prove that 3x^2 - 2mx + m -1 = 0 has real solutions for all real values of m
in
Intermediate/Advanced Algebra
.
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10 replies | 151 view(s)
02-15-2019,
09:49 PM
Subhotosh Khan
replied to a thread
Here's a good problem
in
Math Odds & Ends
That will make sure nobody sits down.........
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10 replies | 168 view(s)
02-14-2019,
04:51 PM
Subhotosh Khan
replied to a thread
Number Probability
in
Intermediate/Advanced Algebra
How many 4-digit numbers are there with all four numbers same (e.g. 1111 or 7777, etc.)? Continue...
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2 replies | 92 view(s)
02-14-2019,
02:46 PM
Subhotosh Khan
replied to a thread
Solving for a variable help.
in
Intermediate/Advanced Algebra
\displaystyle{42.9 \ = \ \pi*\left} \displaystyle{42.9 \ = \ \pi*\dfrac{r^2}{3}\left} continue.....
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2 replies | 69 view(s)
02-13-2019,
03:53 PM
Subhotosh Khan
replied to a thread
PDE Separating Variables Question
in
Differential Equations
What are your thoughts/work regarding this assignment?
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1 replies | 75 view(s)
02-13-2019,
09:19 AM
Subhotosh Khan
replied to a thread
Demo Access to Future FMH Forum
in
News
That means more incomplete sentences, weird abbreviations..... and such.....
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30 replies | 566 view(s)
02-13-2019,
09:13 AM
Subhotosh Khan
replied to a thread
derivative of function
in
Calculus
You know how to calculate: d/dt ....... yes?
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1 replies | 94 view(s)
02-12-2019,
12:41 PM
Subhotosh Khan
replied to a thread
Two graphs have gradient functions dy/dx = 3x^2+3x+a and dy/dx = 3x^2-2x+1.
in
Differential Equations
First thing I would do is to integrate those to given functions: f1(x) = \displaystyle{\int {(3x^2+3x+a)} \ \ dx} f2(x) = \displaystyle{\int...
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1 replies | 84 view(s)
02-12-2019,
09:42 AM
Subhotosh Khan
replied to a thread
trying to work out a scale reduction thing
in
Arithmetic
Suppose the reduced length is "x" mm. Then: x/35 = 64/100 continue and calculate "x"
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1 replies | 100 view(s)
02-11-2019,
10:19 AM
Subhotosh Khan
replied to a thread
Need Help With A Probability Question!!
in
Probability / Statistics
Are you familiar with Venn diagram?
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2 replies | 82 view(s)
02-10-2019,
01:50 PM
Subhotosh Khan
replied to a thread
Holey crypt
in
Math Odds & Ends
But .... Americans cannot get their kicks on "route" 66.... "Route" rhyming with "out" is only used when we (Indians) beat Australia in...
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15 replies | 415 view(s)
02-10-2019,
08:22 AM
Subhotosh Khan
replied to a thread
Arithmetic Sequence
in
Arithmetic
If the first term of the AP (arithmatic progression or sequence) is 'a' and the common differnce is 'd', then: tn = a + (n-1)*d = m and...
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6 replies | 215 view(s)
02-09-2019,
09:34 PM
Subhotosh Khan
replied to a thread
Setting up Lagrange problem
in
Calculus
We do not visit imgur site for various reasons - please share your picture some other way. Please refer to the following post: ...
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4 replies | 254 view(s)
02-09-2019,
09:27 PM
Subhotosh Khan
replied to a thread
Problem help...
in
Beginning Algebra
This can only be done through trial and error! You started the first step - We need to make up 75 pounds. Now suppose we buy 12 cows and 40...
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2 replies | 286 view(s)
02-09-2019,
09:12 PM
Subhotosh Khan
replied to a thread
Solution of a quadratic parametric equation
in
Intermediate/Advanced Algebra
\displaystyle{\dfrac{1}{x^2 + (k-1)x - 2k^2 - 2k} = \dfrac{x}{x^2 - 4k^2}}
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4 replies | 215 view(s)
02-09-2019,
08:39 AM
Subhotosh Khan
replied to a thread
the angle of A
in
Geometry and Trig
A is a point - it does not have size! As it stands can be located anywhere on the plane of the circle and outside the circle.
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9 replies | 255 view(s)
02-09-2019,
08:31 AM
Subhotosh Khan
replied to a thread
Setting up Lagrange problem
in
Calculus
I would start with calculating the equation of the ellipse (curve of intersection).
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4 replies | 254 view(s)
02-08-2019,
09:00 AM
Subhotosh Khan
replied to a thread
Factoring & multiplying: ((V1-v20)/z1)-(v20/z4)+((v3-v20)/z5)+((v2-v20+v3)/z3)=0
in
Intermediate/Advanced Algebra
Look at the given RHS: v20 look at he RHS you have calculated: (v20/z1) + (v20/z4) + (v20/z5) + (v20/z3) Which could be written as:
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7 replies | 396 view(s)
02-07-2019,
04:56 PM
Subhotosh Khan
replied to a thread
Factoring & multiplying: ((V1-v20)/z1)-(v20/z4)+((v3-v20)/z5)+((v2-v20+v3)/z3)=0
in
Intermediate/Advanced Algebra
Great! Now factor out v20 from RHS.
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7 replies | 396 view(s)
02-06-2019,
08:53 AM
Subhotosh Khan
replied to a thread
Help me to prove this Trigonometric problem
in
Geometry and Trig
Hint: start with RHS and convert sine functions to cosine functions using: cos(A-B) - cos(A+B) = 2*sin(A) * sin(B)
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3 replies | 421 view(s)
02-06-2019,
08:49 AM
Subhotosh Khan
replied to a thread
logics: can I assume that "equal" is concrete case of "different"?
in
Beginning Algebra
I assume that your mother-tongue is not english (neither is mine). To discuss these philosophical matters - where you are looking into the meaning of...
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6 replies | 401 view(s)
02-06-2019,
06:22 AM
Subhotosh Khan
replied to a thread
Remainder
in
Intermediate/Advanced Algebra
Please share your work/thoughts regarding this assignment so that we know where to begin to help you.
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2 replies | 314 view(s)
02-05-2019,
02:08 PM
Subhotosh Khan
replied to a thread
moved - Intersection between linear and exponential equations
in
Intermediate/Advanced Algebra
What method/s have been taught to you? What was the topic being covered in class when this was given as HW? Have you been taught to use...
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10 replies | 259 view(s)
02-05-2019,
12:58 PM
Subhotosh Khan
replied to a thread
Perfect Square
in
Arithmetic
Hint: Write 48 in terms of "square" factors
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4 replies | 454 view(s)
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About Subhotosh Khan
Basic Information
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“... mathematics is only the art of saying the same thing in different words” - B. Russell
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18,081
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General Information
Last Activity
Today
06:13 PM
Join Date
06-18-2007
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