SOLUTION: Enter a recursive rule for the geometric sequence. −10, 20, −40, 80, � a(1)= a(n)=

Question 1131037: Enter a recursive rule for the geometric sequence.
−10, 20, −40, 80, �
a(1)=
a(n)=
Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!

The formula for the general term for each geometric sequence is. Let's examine sequence A so that we can find a formula to express its nth term.
The fixed number, called the common ratio (); so, the formula will be

, , , , �

check the rule:
if

-> true, given fourth term of the sequence is

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SOLUTION: Enter a recursive rule for the geometric sequence. &#8722;10,&#8201;20,&#8201;&#8722;40,&#8201;80,&#8201;� a(1)= a(n)=

SOLUTION: Enter a recursive rule for the geometric sequence. −10, 20, −40, 80, � a(1)= a(n)=