Find the first, fourth, and eighth terms of the sequence.
A(n)=-2•2^x-1
To find the first term, we need to substitute x = 1 into the formula for A(n):
A(1) = -2 * 2^(1-1) = -2 * 2^0 = -2 * 1 = -2.
To find the fourth term, we need to substitute x = 4 into the formula for A(n):
A(4) = -2 * 2^(4-1) = -2 * 2^3 = -2 * 8 = -16.
To find the eighth term, we need to substitute x = 8 into the formula for A(n):
A(8) = -2 * 2^(8-1) = -2 * 2^7 = -2 * 128 = -256.
Therefore, the first term is -2, the fourth term is -16, and the eighth term is -256.