Question

Find the sum of in the 20 terms of ap 1,4,7,10.

Answer 1

Answer: 590

Solution has been attached...

Hope this helps...

#Be Brainly.. ;D

Answer 2

Given Ap is 1,4,7,10

first term a = 1

common differences d = 3

Sn = n/2[2a+(n-1)d]..... sum of n terms

Put n=20 for the sum of first 20 terms.

S20..................

..............

S20 = 590

hope this will help you.