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Dec
8
answered express vector with other vectors
Dec
8
answered optimization with non smooth constraint
Dec
8
comment Find $\lim_{x \to -8} \frac{\sqrt{1 - x} - 3 }{ 2 + \sqrt[3] {x}}$
@omidh Please see the update, can you finish it now? Feel free to accept the solution when you understand it to the end...
Dec
8
revised Find $\lim_{x \to -8} \frac{\sqrt{1 - x} - 3 }{ 2 + \sqrt[3] {x}}$
added 454 characters in body
Dec
5
answered expected value - two etaps
Dec
5
comment expected value - two etaps
Likely, etaps means stages and eagle means tail.
Dec
5
answered Find $\lim_{x \to -8} \frac{\sqrt{1 - x} - 3 }{ 2 + \sqrt[3] {x}}$
Dec
5
comment Find $\lim_{x \to -8} \frac{\sqrt{1 - x} - 3 }{ 2 + \sqrt[3] {x}}$
Do you know derivatives? can you use L'Hospital's rule?
Dec
5
revised Riccati differential equation
added 2 characters in body
Dec
5
comment Find $\lim_{x \to -8} \frac{\sqrt{1 - x} - 3 }{ 2 + \sqrt[3] {x}}$
PLease exhibit your work on the problem and we will be glad to give some hints. How about expanding the root in the numerator into Taylor series around $x=1$?
Dec
5
answered Word Permutations
Dec
5
comment What am I doing wrong? (using the formula for lowering powers)
@Cherry_Developer Because $\cos(4x)$ is one object, and also $-\cos(4x) \neq cos(-4x)$
Dec
4
comment What am I doing wrong? (using the formula for lowering powers)
@Cherry_Developer Exactly
Dec
4
answered Find the radius of convergence, R, of the series. and Find the interval, I, of convergence of the series.
Dec
4
revised Find the radius of convergence, R, of the series. and Find the interval, I, of convergence of the series.
added 8 characters in body
Dec
4
answered What am I doing wrong? (using the formula for lowering powers)
Dec
4
comment Laplace transform involving two functions of t
Also, if you are integrating in $dr$, $f(t),g(t)$ go outside of the integral. If you are integrating in $dt$ , you need to set $r = -s$, not $r=s$ as you suggest
Dec
4
comment Laplace transform involving two functions of t
Depends what you want, wikipedia lists a pretty nasty identity for what you tried to do (en.wikipedia.org/wiki/Laplace_transform)
Dec
4
revised Laplace transform involving two functions of t
edited title
Dec
4
comment Laplace transform involving two functions of t
What are $f$ and $g$? What is the integral with respect to, $dt$ or $dr$???