Question 8
Given $C_n^r=\frac{n!}{r!(n-r)!}$, compute $C_7^1+2C_7^2+3C_7^3+\cdots+7C_7^7$.
TIMO 2017 - Senior Secondary (Grades 10-12) - Heat Round - Paper 5 Question 8
TIMO · TIMO 2017 - Senior Secondary (Grades 10-12) - Heat Round - Paper 5
TIMO · TIMO 2017 - Senior Secondary (Grades 10-12) - Heat Round - Paper 5