Math, asked by hetnagar453, 7 months ago

Find the sum of the first on terms of
the following A.P. as asked for:
2,6, 10, 14
up to 20 terms.​

Answers

Answered by Robonaut
0

Sn = n/2 x [2a+(n-1)d]

= 20/2 × [2x2+(20-1)x4]

= 10×(4+19×4)

= 10×(4+76)

= 10x80

= 800

:-)

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