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Which term of the A.P. 90, 87, 84, ........

Which term of the A.P. 90, 87, 84, ..... `is` zero ?

Text Solution

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Here, a=90,
`d=87-90=-3`
Let `a_(n)=0`
`rArr 90+(n-1)(-3)=0`
`rArr 90-3n+3=0`
`rArr -3n=-93 rArr n=31`
`:.` 31st term of the given A.P. is zero.
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