Question

if the nth term of an ap is 4n²-1 then find the 8tg term
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Answer 1

Step-by-step explanation:

an=4n2-1

a1=4(1)2-1=4-1=3

a2=4(2)2-1=4(4)-1=16-1=15

series become 3,15

a=3 d=15-3=12

a8=3+(8-1)12

a8=3+84

a8=87