Question

find a positive value of n for which the coefficient of x^2 in the expansion of (1+x)^n is 10 ​

Answer 1

Answer:

$n = 7$

Step-by-step explanation:

$x2 \\ (1 + x)n = 10 \\ (1 + 2)n = 10 \\ (3)n = 10 \\ n = 10 - 3 \\ n = 7$