find 20th term from the end of the A.P:3,8,13.....253?
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here
first term (a) is 3
and common difference(d) is 5.
(since 8-3=5. 13-8=5)
we need to find 20th term
according to formula
n th term is -- a+(n-1)*d
therefore the answer will be---
3+(20-1)*5
3+19*5
3+95
98
Therefore the answer is 98
first term (a) is 3
and common difference(d) is 5.
(since 8-3=5. 13-8=5)
we need to find 20th term
according to formula
n th term is -- a+(n-1)*d
therefore the answer will be---
3+(20-1)*5
3+19*5
3+95
98
Therefore the answer is 98
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