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If the sum of first 14 terms of an A.P. ...

If the sum of first 14 terms of an A.P. is 1050 and its first term is 10, find the `20^(th)` term.

Text Solution

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Let common difference be `d`
`" " rArr (14)/(2) [ 2(10) + (n-1)d] = 1050`
`" "rArr d = 10`
`" " a_(20) = a + 19 d`
`" " = 10 + 19(10) = 200`
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