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`