Question

i) Complete the following activity to find the sum of natural
numbers between 1.........40 which are divisible by 4.The
numbers between 1 and 140 divisible by 4 are 4,8,12,.....,136.
here, a=4, d-4, tn=​

Answer 1

Answer:

tn= a+(n-1)d

136=4+(n-1)4

n=34

Sn=n/2(2a+(n-1)×d)

=n/2(a+l)

S34=2380

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