Prove $x^2=t$ for any $t>0$
39170
Existence of square root
151805
Prove that $\tau (x_1 x_2 ... x_k) \tau^{-1} = (\tau(x_1) \tau(x_2) ... \tau (x_k))$
149801
prove that $TS = ST$
85731
Prove by induction that $n! > n^2$
66441
Prove that $|x|<1$ implies that $\lim_{n \to \infty} x^n=0$
37813
If $T\colon \mathbb R^n \to \mathbb R^n $ linear and $T^2 = kT$
53307
how to strictly prove $\sin x<x$ for $0<x<\frac{\pi}{2}$
104688
How can I prove that $x-{x^2\over2}<\ln(1+x)$
60559
How prove this $x^3<\sin^2{x}\tan{x},x\in\left(0,\dfrac{\pi}{2}\right)$
145397
How to prove that for every $i$, $a_i = i$
40549
How to proof the the derivative of $x^2$ is $2x$?
52380
How to prove the function $e^x$ is continous for all real numbers
40930
Prove that $ex \leq e^x$ for all $x \in \mathbb{R}$
98255
Find $f(x)$ such that $f(f(x)) = x^2 - 2$
11715
Prove that if $\langle Tx,x\rangle =0$ for all $x \in X$, then $T = 0$
60348
How do I prove $F(a)=F(a^2)?$
52324
Tight bound for $T(n) = T(n^{1/2}) + 1$