Question

Hello Mam How Does In The 12,15,18 of an ap how does 99 cames​

Answer 1

Answer:

The give a.p is

12,1518....

here the first term a =12

common difference = 15 - 12= 3

tn = a+(n-1)d

99 = 12 + (n-1) 3

99 - 12 = (n-1)3

87/3=n-1

n-1= 29

n=29 + 1

n = 30

Answer 2

Answer:

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