Question

The sum of the first 20 terms of an



a.P whose first term is 5 and common difference is 4 is

Answer 1

Step-by-step explanation:

this is the answer please check it out

Answer 2

N=20

A=5

D=4

Sn=n/2(2a+(n-1)d)

Sn=20/2+(2(5)+(20-1)4

Sn=10+(10+(19)4)

Sn=10+(10+76)

Sn=10(86)

Sn=860