lab bhattacharjee
Reputation
166,768
92/100 score
14 124 219
Impact
~2.1m people reached

 135 How to check if a point is inside a rectangle? 106 100-th derivative of a function 90 A family has three children. What is the probability that at least one of them is a boy? 76 $\sqrt{7\sqrt{7\sqrt{7\sqrt{7\sqrt{7\cdots}}}}}$ approximation 62 Find all real numbers $x$ for which $\frac{8^x+27^x}{12^x+18^x}=\frac76$

### Reputation (166,768)

 +10 Finding horizontal tangent line using implicit differentation +10 Problem based on amplitude of complex number +25 Prove this inequality with trigonometry $9\cos^2{x}-10\cos{x}\sin{y}-8\cos{y}\sin{x}+17\ge 1$ +10 Sum of tangent functions where arguments are in specific arithmetic series

### Questions (30)

 41 Are all limits solvable without L'Hôpital Rule or Series Expansion 13 Is $\tan(\pi/2)$ undefined or infinity? 11 Updates on Lehmer's Totient Problem 10 If $a^n-b^n$ is integer for all positive integral value of $n$, then $a$, $b$ must also be integers. 10 When does $n$ divide $a^d+1$?

### Tags (285)

 3k calculus × 1182 1k limits × 539 2k trigonometry × 1391 1k sequences-and-series × 388 2k algebra-precalculus × 872 640 number-theory × 332 2k elementary-number-theory × 821 528 indefinite-integrals × 160 2k integration × 582 525 modular-arithmetic × 330

### Accounts (16)

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