Question

Find the first, fourth, and eighth terms of the sequence A(n)=-3 X 2^n-1

1; –216; –279,936

–6; –48; –768

–12; –96; –1,536

–3; –24; –384

Answer 1

Answer: –3; –24; –384

Explanation:

Answer 2

The answer is

3, 24, 384

Explanation:

Usng the formula

`A(n) = 3(2) ^(n - 1)`

Where n is the number of terms

For the first term

`A(1) = 3(2)^(1 - 1) \\ = 3(2) ^(0) \\ = 3(1) \\ \\ = 3`

For the fourth term

`A(4) = 3(2)^(4 - 1) \\ = 3 ({2})^(3) \\ = 3 * 8 \\ \\ = 24`

For the eighth term

`A(8) = 3 ({2})^(8 - 1) \\ = 3 ({2})^(7) \\ = 3(128) \\ \\ = 384`

Hope this helps you