Question

find the sum of first five multiple of 7

Answer 1

7×7×7×7×7=16807answer

Answer 2

Answer:

Step-by-step explanation:

1st five multiples of 7 are 7,14,21,28,35

Now here,

a=7

n=5terms

Last term, l=35

Sum=n/2(a+l)

=5/2(7+35)

=5/2*42

=5*21

=105

So,the answer is 105