1-Find the fifth term in the geometric sequence -10,-40,-160….?

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2007-04-04 05:10:51 · 5 answers · asked by MSI 1 in Science & Mathematics ➔ Mathematics

-10, -40, -160, -640, -2560

A: -2560

2007-04-04 05:15:57 · answer #1 · answered by southwind 5 · 0⤊ 0⤋

Multiply 160 by 4. the result is 640.

2007-04-04 12:20:48 · answer #2 · answered by fangtaiyang 7 · 0⤊ 1⤋

-10
-40
-160
-640
-2560

2007-04-04 12:19:46 · answer #3 · answered by Me 4 · 0⤊ 0⤋

-3410

the terms are being multiplied by four so the fourth term is -640 and the fifth is -2560. add all those together to get the answer

2007-04-04 12:14:38 · answer #4 · answered by not_so_geenyus 1 · 0⤊ 1⤋

x=-10[4^(y-1)]
Where x is the answer and y is the term position (5th)
x=-10[4^(5-1)]
x=-10(4^4)
x=-2560

2007-04-04 12:17:05 · answer #5 · answered by trojanknight_96 3 · 0⤊ 0⤋