Question

First term = 5 , common difference = 7 , number of terms 30 ,find the sum of this AP ​

Answer 1

Answer:

Refers to this attachment...

Answer 2

Given:

First term=a = 5

common difference =d= 7

number of terms= n=30

Answer:

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

put given values in the formula

S= 30/2(2(5)+(30-1)7)

S= 30/2(10+29×7)

S=30/2(10+203)

S=15(213)

S=3195