Bouazza S.
Reputation
Next privilege 250 Rep.
7
Impact
~13k people reached

 8 How should I approach taking math tests? 6 Proof that $\sum\limits_{k=1}^nk^2 = \frac{n(n+1)(2n+1)}{6}$? 5 Proof by induction that $2^n \gt n^k$ 3 Trigonometry: Solve $(1-\cos\alpha)^2 + \sin^2\alpha = d^2$ for $\alpha$ 1 How does $\sum_{n = 1}^{\infty} \frac{1}{n(n+1)}$ simplify?

### Reputation (182)

 +10 How does $\sum_{n = 1}^{\infty} \frac{1}{n(n+1)}$ simplify? +50 Proof that $\sum\limits_{k=1}^nk^2 = \frac{n(n+1)(2n+1)}{6}$? +10 Trigonometry: Solve $(1-\cos\alpha)^2 + \sin^2\alpha = d^2$ for $\alpha$ +10 Proof by induction that $2^n \gt n^k$

### Questions (3)

 5 Locus and concurrent lines 0 Show that $x \mapsto \left( x^{\top} \sigma x , -\mu^{\top}x \right)^{\top}$ transforms a given set into a convex set. 0 Problems about symmetric groups

### Tags (16)

 7 sequences-and-series × 2 5 induction 6 discrete-mathematics 3 trigonometry 6 proof-strategy 0 geometry × 2 6 summation 0 analytic-geometry × 2 5 inequality 0 euclidean-geometry

### Accounts (2)

 Mathematics 182 rep 7 Stack Overflow 1 rep 1