Question

Which of the following expressions correctly uses the properties of summations to represent E(72 +9)?Σ18Ο Α. 18Σ2 +9Ο Β.18Σε +9)18Ο C.Σ2 +18.9Ο D. 18 181Σ Σi+18-9

Answer 1

Given,

$\sum ^{18}_{i\mathop=1}(7i^2+9)$

Simplifying we have,

$7\sum ^{18}_{i\mathop=1}i^2+9$

$A.7\sum ^{18}_{i\mathop{=}1}i^2+9$

Thus the answer is:

$A.7\sum ^{18}_{i\mathop{=}1}i^2+9$