Which formula describes the following geometric sequence? remember that n represents the term number. 3, 6, 12, 24, an = 2 · 3n - 1 an = 3 · 2n - 1 an = 2 + 3(n - 1) an = 3 + 2(n - 1)

Geometric sequence:
1st 2nd 3rd 4th
  3,   6,   12,  24,... 

an = 2 * 3n - 1
an = 3 * 2n - 1
an = 2 + 3(n-1) 
an = 3 + 2(n-1)

n = term number

first term = 3 ; common ratio is 2

a(n) = 3 * 2(n-1)
a(3) = 3 * 2(3-1)
a(3) = 3 * 2(2)
a(3) = 3 * 4
a(3) = 12  correct.

a(n) = 3 * 2(n-1)

Answer 20 centimeters15+8=2323-3=20so the answer is 20 centimeters

i = 2 / - 5

step-by-step explanation:

evaluation of ( 2 - 4 ) ( p + q ) when p = 2 and q = 5 i, by putting values of p and q,                                                                    

0 = ( 2 - 4 ) ( p + q )0 = ( 2 - 4 ) ( 2 + 5 i ),   by multiplying these0 = ( 4 + 10 i - 8 - 20 i )0 = 4 - 8 + 10 i - 20 i0 = - 4 -10 i   0 = 2 ( - 2 - 5 i )0 / 2 = - 2 - 5 i- 2 - 5 i = 0- 5 i = 2i = 2 / - 5