Question

Write an expression for the general or nth term, an, for the geometric sequence. 1, -4, 16, -64, . . .

A. an = 1 • (-4)n-1

B. an = 1 • (-4)n

C. an = 1 • 4n-1

D. an = -1 • 4n

Answer 1

do you know what is common ratio in geometric sequence ??

Answer 2

not really

Answer 3

common ratio (r) is the ratio of next term to current term in a geometric sequence,
like
r = 2nd term/ 1st term = -4/1 = -4 here
got this ?

Answer 4

no ? any doubts ?

Answer 5

YA WHAT IS THE ANSWER

Answer 6

why you just need the answer ? don't want to learn how to get it ?

Answer 7

I STILL DONT UNDERSTAND BUT WHAT EVER

Answer 8

is -4/1 = 16/-4 = -64/16 ?