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lookagain
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lookagain
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05-22-2018,
01:40 PM
lookagain
replied to a thread
Equation of tangent line to (6-2x)^1/2 at x=1
in
Calculus
As others referred to, for this to make sense/work out, it must be written out equivalent to: y = (6-2x)^(1/2) The grouping symbols around...
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5 replies | 129 view(s)
05-20-2018,
06:15 PM
lookagain
replied to a thread
Help w/ composition fcns f(g(x)), g(f(x)), given f(x) = (2/x), g(x) = x^2+x-1
in
Intermediate/Advanced Algebra
Your solutions to the equation of your example don't match it. Maybe you intended the equation \ \ x^2 - 2 = 0.
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7 replies | 205 view(s)
05-19-2018,
01:15 PM
lookagain
replied to a thread
solve eqn w/ variable in exponent using logarithms: 10*2^x - 8*5^(x-2) = 0
in
Intermediate/Advanced Algebra
\dfrac{log(31.25)}{log(2.5)} \ = \ 3.756... It approximately equals 3.76.
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11 replies | 315 view(s)
05-16-2018,
10:52 AM
lookagain
replied to a thread
Polynomial question: (x-y)((x^k-1)y + (x^k-2)y + (x^k-3)y^2 + ... + y^k-1)
in
Beginning Algebra
You need grouping symbols: (x^k - y^k)/(x - y) = x^(k - 1) + yx^(k - 2) + ... + y^(k - 2)x + y^(k - 1) Or, add one pair of brackets to made...
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22 replies | 789 view(s)
05-13-2018,
09:46 AM
lookagain
replied to a thread
What this sign mean (upward and downward arrows in 'limit' expressions)
in
Calculus
That downward arrow must mean "approaching from the right." And the upward arrow must mean "approaching from the left."
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3 replies | 173 view(s)
05-05-2018,
12:06 AM
lookagain
replied to a thread
An interesting task: Number is written w/ only 0, 3, 7; show there's no perfect squar
in
Intermediate/Advanced Algebra
Incorrect. Every real number can be multiplied by itself, including zero. 0*0 \ = \ 0 I don't know what you were getting at.
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7 replies | 454 view(s)
05-04-2018,
11:48 PM
lookagain
replied to a thread
Dividing single term algebraic fractions that won't factorise
in
Intermediate/Advanced Algebra
This site does not use , for Latex. Here is what you intended: If j here is the "imaginary unit" then multiply both numerator and denominator...
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3 replies | 173 view(s)
05-04-2018,
11:40 PM
lookagain
replied to a thread
How do you factor a^4 + 4 * b ^ 4?
in
Intermediate/Advanced Algebra
You are incorrect. Follow Subhotosh Khan's hint. That will factor as the product of two trinomials, each having integer coefficients.
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3 replies | 156 view(s)
04-30-2018,
08:02 PM
lookagain
replied to a thread
How should this problem be written/answer? "If 2.34% = 100 people, then how many...?"
in
Arithmetic
n = 100/(2.34%)
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6 replies | 274 view(s)
04-30-2018,
06:27 PM
lookagain
replied to a thread
How should this problem be written/answer? "If 2.34% = 100 people, then how many...?"
in
Arithmetic
You need 2.34% of something . If 2.34% of the total number of people = 100 people, how many people would 100% of the total number of people be? ...
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6 replies | 274 view(s)
04-30-2018,
06:03 PM
lookagain
replied to a thread
How to make 93 out of these numbers? 1 9 9 2 (in that order)
in
Arithmetic
\Gamma{(n)} \ = \ (n - 1)! \ \ \ \ \ \ \ Each \ \ n \ \ is \ \ a \ \ positive \ \ integer. \ \ - - - - - - - - - - - - - - - - - - - - - - - -...
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11 replies | 658 view(s)
04-30-2018,
11:36 AM
lookagain
replied to a thread
How to make 93 out of these numbers? 1 9 9 2 (in that order)
in
Arithmetic
log(1 + 9) + 92 = 93
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11 replies | 658 view(s)
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