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Aug
23
reviewed Approve If $f’(x) = \sin x + (\sin4x)(\cos x)$, then $f’(2x^2 + \pi/2) $is?
Aug
19
reviewed Approve Method of moment estimator. Deconvolution
Aug
19
reviewed Approve elimination method and solving for constants
Aug
18
reviewed Approve How do I solve this system using graphing?
Aug
18
reviewed Leave Open Show that the propositions r → s and ¬r ∨ s are equivalent
Aug
18
reviewed No Action Needed Prove by induction $4^n > n^2$ for $n \geq 1$
Aug
18
reviewed No Action Needed Limiting how often an element can repeat
Aug
7
reviewed Approve Fourier transform of $e^{-at^2}= \frac{1}{\sqrt{2a}}e^{\frac{-w^2}{4a}}$
Aug
2
reviewed Approve Showing that $\frac{1}{2^n +1} + \frac{1}{2^n +2} + \cdots + \frac{1}{2^{n+1}}\geq \frac{1}{2}$ for all $n\geq 1$
Jul
31
reviewed Approve Help in finding the integral function.
Jul
30
reviewed Approve washer method calculus help
Jul
30
reviewed Approve Use graphical methods to solve the linear programming problem. Maximize:
Jul
29
reviewed Leave Open How many words can be formed using all the letters of “DAUGHTER” so that vowels always come together?
Jul
28
reviewed Approve inequality question?
Jul
27
reviewed Approve Limit calculation: $\lim_{x\to 0}\frac{1}{x}\ln\left(\frac{e^x − 1}{x}\right)=$?
Jul
13
reviewed Approve limits of integration and derivative
Jul
8
reviewed Approve using substitution to solve problems
Jun
24
reviewed Approve Limit $(e^x+x)^{1/x}$, when $x\to 0$
Jun
24
reviewed Approve Proof $x_n \to \inf (A)$
Jun
24
reviewed Approve My brother asked me to explain a algebra problem. How should I explain it?