Question

Is 147 a term of the AP 3,7,11 justify your answer​

Answer 1

Answer:

No, because here a=3 an odd number and d=4 which is even. So, sum of odd and even must be odd whereas 144 is an even number.

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Answer 2

Answer:

let 147 is the n th term of the series

here 1st term a=3

common difference d=7-3=4

so ,

a+(n-1).d=147

=> 3+(n-1).4=147

=> 3+4n-4=147

=> 4n-1=147

=> 4n=147+1

=> 4n=148

÷> n=148/4

=> n=37

so,147 is the 37 th term of the series