If some of 8 terms of an AP is 100and first term is 2find 30th term
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Answer:
30 th term is 80
Step-by-step explanation:
a=1st term
a+d=2nd term
a+2d=3rd term
a+3d=4th term
a+4d=5th term
a+5d=6th term
a+6d=7th term
a+7d=8th term
sum is 100
then,
a=2 ( because 2 is first term)
in the term all a is 8 and d is 28d
then, 2×8=16
16+28d=100 ( sum of 8 th terms)
d=100-16/28
d=84/28=3
d=3
then we have to find 30th term
a+find term×d=term
2+29(3) =term
2+78=80
30th term is 80
hope apko smjh aa gya hoga... all the best
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