Question

Evaluate the sum A. 306 B. 240 C. 360 D. 272

Answer 1

Answer:

Option D. $272$

Step-by-step explanation:

we know that

To evaluate the sum , use the formula

$S=\frac{1}{2}(a1+an)n$

where

a1 is the first term

an is the last term

n is the number of terms

In this problem

For n=1 ------> a1=2(1)=2

For n=16 ------> an=2(16)=32

n=16 terms

substitute in the formula

$S=\frac{1}{2}(2+32)16$

$S=272$