SOLUTION: in a geometric sequence the fourth term is 8 and the tenth term is 512. if common ratio is negative, find the first three terms.

Question 378767: in a geometric sequence the fourth term is 8 and the tenth term is 512. if common ratio is negative, find the first three terms.

Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!



Hi,

For a Geometric Sequence with common ratio= r  Question States





 





 as the and common ratio is given as negative  r= -2



CHECKING our answer by reviewing the first 10 terms of this sequence:

 -1, 2, -4, 8, -16, 32, -64, 128, -256, 512 

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