Math, asked by Likhith3540, 11 months ago

If the first term of an A.P. is 2 and common difference is 4, then the sum of its 40 terms is
A. 3200
B. 1600
C. 200
D. 2800

Answers

Answered by Nix95bat

1

Answer: (A) 3200

Step-by-step explanation:

Gauss's Formula = n/2 x [2a + (n-1)d]

a = 2

d= 2

n = 40

substituting values.......

=40/2 x [4 + (39)4]

=20 x [4 + 156]

=20 x 160

=3200

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