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OpenStudy (anonymous):
What is the next number in this geometric sequence? -3.24, 9.72, -29.16, 87.48, , ...
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hartnn (hartnn):
Hi rachel :) Can you find the common ratio "r" between the terms ? or know what it is ?
OpenStudy (anonymous):
i think its 3 i got 3 by dividing 9.72 & -3.24 (:
hartnn (hartnn):
when you dive a positive number by a negative number, you get a negative number :)
OpenStudy (anonymous):
Oh yeah its -3 haha but the choices are A. 174.96 B. -174.96 C. -262.44 D. 262.44
hartnn (hartnn):
ok, so -3 is the common ratio :) each nect term is -3 times the current term! so the next term in your sequence will be 87.48 times -3 = ... ?
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