Geometric sequence?

2 ⤊

Write the first five terms of the geometric sequence with the first term a1 and common ratio r.

a1=5 , r = -1/2

2007-05-14 06:58:43 · 4 answers · asked by adr m 1 in Science & Mathematics ➔ Mathematics

4 answers

a1=5
a2=5*-1/2
a3=a2*-1/2
a4=a3*-1/2
a5=a4*-1/2

2007-05-14 07:01:57 · answer #1 · answered by Dmitrik B 2 · 0⤊ 1⤋

First take the ameliorations, 40 8, 24, 12,... they don't seem to be consistent so it is not arithmetic Now see if there's a undemanding ratio, ninety six/40 8 = 2, 40 8/24 = 2, .... confident so the sequence is geometric.

2016-12-11 09:13:04 · answer #2 · answered by Anonymous · 0⤊ 0⤋

equation=5(-.5)^n
n=terms
2.5

2007-05-14 07:26:17 · answer #3 · answered by Anonymous · 0⤊ 0⤋

5,-5/2,5/4,-5/8,5/16

2007-05-14 07:01:39 · answer #4 · answered by maussy 7 · 2⤊ 0⤋