Math, asked by nagamaniboregowda, 8 months ago

find the sum of first 100 terms of an AP whose third and fourth terms are 10 and 16​

Answers

Answered by Anonymous
4

a + 2d = 10...............1

a + 3d = 16...............2

_________________

-d = -6

d = 6

from 1

a = 10 - 12 = -2

Sum of first 100th term

= 100/2 {2 x (-2) + 99 x 6}

= 50 ( -4 + 594 )

= 50 x 590

= 29500

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