Question 6
Compute $9\binom81+9^2\binom82+9^3\binom83+\cdots+9^7\binom87+9^8\binom88$.
TIMO 2018 - Senior Secondary (Grades 10-12) - Preliminary Round - Paper 4 Question 6
TIMO · TIMO 2018 - Senior Secondary (Grades 10-12) - Preliminary Round - Paper 4