if the sum of first 14 terms of an ap is 1050 and its first term is 10 find the 20th term
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ankit251671:
thanks bhai
Ur wlcm..!
correct Sum of nth term Formula is N/2{a+ (n-1) d . but you use" 2a " in place of only " a "
can u explain Apply formula ???
Sorry but u are wrong.... It's 2a not a.... There's another formula as well ie Sn = n/2(a + an)....
Apply where..?!..... I didn't get u.!
In answer of this question.
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