the sum of first 14 terms of an AP is 1050 and its 14th term is 140 .find the 20 th term
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14th term =140
a+13d=140
sum of 1st 14 terms =1050
14(a+a+13d)/2=1050
14(a+140)=1050×2
a+140=2100/14
a+140=150
a=10
a+13d=140
13d=140-10
d=130/13
d=10
20th term=a+19d
=10+19×10
=200
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a+13d=140
sum of 1st 14 terms =1050
14(a+a+13d)/2=1050
14(a+140)=1050×2
a+140=2100/14
a+140=150
a=10
a+13d=140
13d=140-10
d=130/13
d=10
20th term=a+19d
=10+19×10
=200
Mark as brainliest
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