Question Which exponential function can be used to show the geometric sequence 40, 160, 640, . . . ?(1 point) Responses an=40(120)n−1 a subscript n baseline equals 40 left parenthesis 120 right parenthesis superscript n minus 1 baseline an=4(40)n−1 a subscript n baseline equals 4 left parenthesis 40 right parenthesis superscript n minus 1 baseline an=40+4(n−1) a subscript n baseline equals 40 plus 4 left parenthesis n minus 1 right parenthesis an=40(4)n−1 a subscript n baseline equals 40 left parenthesis 4 right parenthesis superscript n minus 1 baseline Skip to navigation page 24 of 24
The exponential function that can be used to show the geometric sequence 40, 160, 640, ... is given by:
an = 40 * 4^(n-1)
Therefore, the correct answer is:
an = 40(4)n−1