Question

30 points!! What is the sum of this series?

Answer 1

Answer:

$Sum=95$

Step-by-step explanation:

$S=\sum_{n=4}^8 (2n+7)\\\\Expand\ the\ Series\\\\S=(2\times 4+7)+(2\times 5+7)+(2\times 6+7)+(2\times 7+7)+(2\times 8+7)\\\\S=15+17+19+21+23\\\\S=95$