Prove that $f(x)<1+\pi/4$
68774
Proving that $f(x)$ is less than or equal to $1+\pi/4$
76977
Prove that $f(n)$ is the nearest integer to $\frac12(1+\sqrt2)^{n+1}$?
1057
How prove this integral limit $=f(\frac{1}{2})$
119133
there is $M<\infty$ such that $\sum_{n} |\hat{f}(n)|\le M\int_{0}^{2\pi}|f(t)|dt$ for each $f\in X$
121771
Proof $f(x)\equiv 0$
1588
How to prove $\int_{-\pi}^\pi (f(x))^2dx\le \int_{-\pi}^\pi (f'(x))^2dx$
91000
Prove that $\frac{1}{a+1}0$
104688
How can I prove that $x-{x^2\over2}<\ln(1+x)$
30385
Proving that $\frac{e^x + e^{-x}}2 \le e^{x^2/2}$
155232
Prove that inequality is true for $x>0$: $(e^x-1)\ln(1+x) > x^2$
61799
Prove that $\Vert f(b)-f(a)-f'(a)(b-a) \Vert\leq \sup_{x\in [a,b]} \Vert f''(x)\Vert\Vert b-a\Vert^2$
98344
Prove that $\int_0^1[f''(x)]^2dx\ge4.$
11499
How to show the inequality for $\int_{0}^{\pi/4}\tan^n(x) dx$
122326
Proving $|P(A\cap B)-P(A)P(B)|\leq \frac{1}4$
122971
how to prove that $\ln(1+x)< x$
88097
Fourier series for $f(x)=(\pi -x)/2$
62417
Prove This Inequality ${\pi \over 2} \le \sum_{n=0}^{\infty} {1 \over {1+n^2}} \le {\pi \over 2} + 1$