Formulate the recursive formula for the following geometric sequence. {-16, 4, -1, }

The first term is -16, so we have

... a[1] = -16

Each term is -1/4 of the one before it, so the recursive rule is

... a[n+1] = (-1/4)a[n]

goog may have it for you

it's undefined because anything multiplied by 0 is 0. that said, 7 days is 168 hours