The sum of the first n terms of an AP is given by 7n² - 3n. Find the AP.
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Step-by-step explanation:
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Answer:
Step-by-step explanation:
as the nth term is given : 7n^2-3n
then the AP will be
case(i): n=1
=7(1)^2 - 3(1)
=7-3
=4
case(ii): n=2
=7(2)^2 - 3(2)
=7(4)-6
=28-6
=22
case(iii): n=3
=7(3)^2 - 3(3)
=7(9)-9
=63-9
=54
therefore the AP will be :
4 , 22 , 54 ,..........
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