Question

Find the sum of first as terme
positive integers which are divisible
by a​

Answer 1

Answer:

Answer

First term =a=7

Difference between terms=d=7

Number of terms =n=40

Sum=S=

2

n

(2a+(n−1)d))

S=

2

40

(2×7+(40−1)7))

S=20×(2×7+(39)7))

S=20×(14+273)

S=20×287

S=5740