Question

find the sum of 7 E 3i - 15
i =2

answers :
9
0
-9
6

Answer 1

Answer:

-9

Step-by-step explanation:

find the value of i2, which is -9, find the value of i7, which is 6

Then, add them together and multiply by the number of terms in the sequence divided by 2 (6/2=3)