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Jun
26
answered If $\arctan(x)+\arctan(y)+\arctan(z)=\pi/2$ how to show that $xy+yz+zx=1$?
Jun
26
revised What are the last two digits of $77^{17}$?
added 1 character in body
Jun
25
comment How do I show :$\sum_{n=0}^{\infty }\frac{(-1)^n}{n+1}=\ln2$?
See math.stackexchange.com/questions/903049/… and math.stackexchange.com/questions/594838/…
Jun
25
answered Help with indefinite integration
Jun
25
comment Arithmetic progression involving triplets of numbers
@KartikWatwani, Yes and $c=bk=(ak)k=\cdots$
Jun
25
comment Arithmetic progression involving triplets of numbers
@KartikWatwani, This parametrizes $b^2=ac$ by limiting the system in to two variables $a,k$ instead of three $a,b,c$
Jun
25
answered Arithmetic progression involving triplets of numbers
Jun
25
comment Find all $x$ such that $2^x,2^{x^2}$ and $2^{x^3}$ form $3$ terms of an A.P.
@user84413, Yes & the assumption should be included in the answer
Jun
25
answered Substituting a value of sine function in a trigonometric equation
Jun
24
comment Limit $(e^x+x)^{1/x}$, when $x\to 0$
@AndreyAndrey, You can not omit $O(x)$ as both the numerator & the denominator has terms with $O(x)$
Jun
24
comment Limit $(e^x+x)^{1/x}$, when $x\to 0$
@AndreyAndrey, Please find the updated answer
Jun
24
revised Limit $(e^x+x)^{1/x}$, when $x\to 0$
added 161 characters in body
Jun
24
answered Limit $(e^x+x)^{1/x}$, when $x\to 0$
Jun
24
awarded  Popular Question
Jun
24
answered Find all $x$ such that $2^x,2^{x^2}$ and $2^{x^3}$ form $3$ terms of an A.P.
Jun
24
comment What are the last two digits of $77^{17}$?
@Bernard, $(1)$ is $\pmod4, (2)$ is $\pmod{25}$
Jun
24
answered What are the last two digits of $77^{17}$?
Jun
24
answered What are the last two digits of $77^{17}$?
Jun
24
revised What are the last two digits of $77^{17}$?
edited body
Jun
24
answered What are the last two digits of $77^{17}$?