Question

Find the sum of 17 terms of A.P. 5, 9, 13, 17...​

Answer 1

Answer:

Step-by-step explanation:

Answer 2

Answer:

total sum of 17 terms=629

Step-by-step explanation:

a=5,d=4,n=17 Sn=(n/2)*(2a+(n-1)d) S17=(17/2)(2×5+(17-1)4) =(17/2)(10+16×4) =(17/2)(74) =629