Question

Consider the series 10 j-2 (-2j+1)

Answer 1

Option C

Explanation:

Given expression for the series is,

`\sum_(j=2)^(10)(-2j+1)`

Here, j = Numbers of terms (from 2 to 10)

By substituting j = 2 to 10 we can find the terms of the series.

2, 3, 4, 5, 6, 7, 8, 9, 10

So the number of terms in the given series = 9

Option C will be the correct option.