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 Apr 14 revised Prove that $3^x$ divides $(3x)!\,\,\,\, \forall x \ge 1$ added 17 characters in body; edited title Apr 14 revised Show that $\int_{C} \frac{e^{az}}{\sin(\pi z)} \,dz \rightarrow 0 \quad as \quad R \rightarrow \infty$ added 3 characters in body; edited title Mar 29 revised Show $\mathbb {R}[x,y]/(y^2-x, y-x)$ is not an integral domain edited title Mar 23 reviewed Approve What is the dimension for the following basis? Mar 13 revised Find a basis for $p(1) + p(3) = 0$ added 6 characters in body Mar 11 awarded Popular Question Mar 10 reviewed Approve Find $\lim_{(x,y) \to (0,0)} \frac{\tan(x^3+y^3)}{\sin(x^2+y^2)}$ Mar 6 comment How to find the length of the shortest path? Thanks a lot for your explanation. Got it.. Mar 5 asked How to find the length of the shortest path? Jan 28 accepted How many non-negative integers less than $10000$ are there such that… Jan 28 revised How many non-negative integers less than $10000$ are there such that… edited body Jan 28 revised How many non-negative integers less than $10000$ are there such that… added 93 characters in body Jan 28 revised How many non-negative integers less than $10000$ are there such that… added 93 characters in body Jan 28 asked How many non-negative integers less than $10000$ are there such that… Jan 28 accepted An object is placed in front of a plane mirror of length $L$ … Jan 20 awarded Popular Question Jan 16 reviewed No Action Needed Translating an equation from multiplicative to additive form Jan 15 comment Check whether the following series is convergent/divergent Thanks a lot sir for your time. But what about the second problem ? Is it ok ? Jan 15 accepted Check whether the following series is convergent/divergent Jan 15 asked Check whether the following series is convergent/divergent