SOLUTION: Find the 15th term of the given sequence -9, 27 , -81.....

Question 607190: Find the 15th term of the given sequence -9, 27 , -81.....
Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!

first, identify the first term in the sequence, call this number a.
you have
second, calculate the common ratio of the sequence
in your case the common ratio is
if you multiply first term by common ratio you get second term
third, you need , the term you need to find
in your case

forth, insert these values into the equation:
and calculate the term

so, your sequence is:
-9, 27 , -81, 243, -729, 2187,-6561, 19683, -59049, 177147,-531441,1594323,-4782969, 14348907,

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