Question

if the nth term of an AP 4n^2-1then find the 8th term
$4n ^2 - 1$
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Answer 1

Step-by-step explanation:

nth term=4n^2-1

8th term=4.8^2-1

=4.64-1

=256-1

=255

Answer 2

Answer:

87

Step-by-step explanation:

let the first term be a, common difference be d

so from 4n^2-1

a=3 ( as n=1)

second term (a+d) =4.2^2-1 (n=2)

so d=12

Now eighth term =a+7d=3+7.12