Question

Suppose T(n) = n(n +1)/2. Find T(10).

a
45
b
45/2
c
55/2
d
55

Answer 1

D. 55

Explanation:

`T(n) = (n(n +1))/(2) \\ \\ T(10) = (10(10 +1))/(2) \\ \\T(10) = (10* 11)/(2) \\ \\T(10) = 5 * 11 \\ \\ \huge \red{ \boxed{T(10) = 55}}`