Question

the sum of how many terms of the AP 22, 20,18,...... will be zero?(ans.=23 term )

Answer 1

step by step explanation

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Answer 2

Thanks for asking the question.

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First term= 22

Common difference=-2. (20-22)

ok let the sum of n terms in this AP is zero

so

0=n/2{2×first term+(n-1)×-2}

0×2/n=2×22-2n+2

0=44+2-2n

-46=-2n

n=-46/-2

n=23

So the answer is 23

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