disastergg Group Title a=find the first, fourth, and eighth terms of each sequence. A(n)=-5*3^n-1 one year ago one year ago

1. satellite73 Group Title

$A(1)=-5\times 3^{1-1}=-5\times 3^0=-5$ for the first one others are similar

2. disastergg Group Title

@satellite73 wait how did the 1 change to 0?

3. satellite73 Group Title

the exponent is $$n-1$$ if you replace $$n$$ by $$1$$ you get $$1-1=0$$