Math, asked by anvesharanjan1310, 4 months ago

How many terms of AP 18, 16, 14, ... should
be taken, so that their sum is zero?

Answers

Answered by kushalghosh20

1

Answer:

10 terms

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Answered by ak1846272

1

Answer:

sn=0

a=18

d=a2-a1=16-18=-2

n=?

sn=n/2(2a+(n-1)d)

0=n/2(2*18+(n-1)-2)

0*2=n(36-2n+2)

0=n(38-2n)

0=(n+0)(38-2n)

n=0 n=19

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