Question

find the sum of first 20terms of the arithmetic progression 3,8,13....​

Answer 1

Answer:

1010

Step-by-step explanation:

AP =3,8,13

A=3,D=5,N=20

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

20/2(3)+(20-1)5)

10(6+(19)5)

10(6+95)

10(101)

Sum=1010

Hope this will help you❣️

Answer 2

Answer:

hope it helps you champion