Question

6
What is the sum of the series Σ (3k - 20)?
k=3

Answer 1

The sigma notation can be used to do quick summation so

you can re-write it as :

( 3 * 3 - 20) + ( 3 * 4 - 20 ) + (3 * 5 - 20) + (3* 6 - 20) = - 26

Increment : 1
Max value of k : 6
start point : 3