Question

The first term of an Ap is 2 and the common
difference is 4. The sum of its 40 terms
will be​

Answer 1

Step-by-step explanation:

Here,

a=2

d=4 and n=40

as we know, Sn=n/2(2a+(n-1)d)

S40=40/2(2*2+(40–1)4)

=20(4+156)

=20*160

=3200

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