Question

If the sum of first fourteen terms of an ap is 1050 and its first term is 10 find its 20th term?

Answer 1

a + 13d = 1050
a = 10.
Therefore
d = 80.
a20 = a + 19d = 10 + 19(80) = 1530.

Where a = 1st term , d = common difference , a20 = 20th term.


The answer is 1530.


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