### Answers (23)

 2 Prove polynomial identity $x^k-1=(x-1)(x^{k-1}+x^{k-2}+\ldots+1).$ 2 Prove a function is differentiable with chain rule 2 Find $f, g$ such that $f'=g, g'=f, f(0)=1, g(0)=0.$ 2 Calculate the limit of $a_n = n(2^{1/n}-1)$ 1 Explaining $\sum_{i=1}^n\sum_{j=1}^nCov(Y_i,B_j)=\sum_{i=1}^n\sum_{j=1,j\neq i}^nCov(Y_i,B_j)+\sum_{i=1}^nCov(Y_i,B_i)$

### Reputation (464)

This user has no recent positive reputation changes

### Question (1)

 4 Ways to speed up solving an LP with Google's ortools [closed]

### Tags (44)

 5 real-analysis × 6 2 calculus × 3 4 probability × 7 2 derivatives × 2 3 integration × 3 2 definite-integrals × 2 3 sequences-and-series × 2 2 chain-rule 2 statistics × 3 2 elementary-number-theory

### Accounts (6)

 Mathematics 464 rep 11 silver badge88 bronze badges Computational Science 126 rep 33 bronze badges Stack Overflow 108 rep 44 bronze badges Cross Validated 101 rep 11 bronze badge Computer Science 101 rep

### Badges (9)

 Yearling Supporter Critic Teacher Commentator Custodian Organizer Editor Student

### Active bounties (0)

This user has no active bounties

### Votes cast (182)

all time   by type
178 up 107 question
4 down 75 answer