Question

The nth term is 3n + 4 why is 21 not In the sequence

Answer 1

It is given that nth term is 3n+ 4

let the nth term be 21

then,3n+ 4=21

3n = 21-4

3n = 17

n = 17/3

here n denotes no. of terms

since no. of terms should be a natural number 21 cannot be in the sequence.

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