Question

Which formula can be used to find the nth term of

the sequence 3, 21, 147, ... ?
O
a₁ = 7; an = an-1.3
O
a₁ =1;an =an-1.7
O
a₁ = 3; an = an-1.7
*
a₁ = 3; an = an-1.21

Answer 1

The formula to find the nth term of the given sequence is a₁ = 3; an = an-1.21.

Step-by-step explanation:

The formula that can be used to find the nth term of the given sequence 3, 21, 147 is a₁ = 3; an = an-1.21. This means that the first term (a₁) is 3, and each subsequent term (an) is equal to the previous term multiplied by 21.

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