Question

first term and the common difference of an A.P. are 12 and 4 respectively.If tn =96 find n​

Answer 1

given:-

first term(a)=12

common difference (d)=4

tn =96

find n=?

by using Formula,

tn=a+(n-1)d

96=12(n-1)×4

96=12+4n-4

96-12=4n-4

84=4n-4

4n-4=84

4n=84-4

4n=88

n=88/4

n=22