Question

What is the common ratio between successive terms in the sequence? 2, –4, 8, –16, 32, –64, ..

Answer 1

Ratio of a GP = (Tn)/Tn-1)

Given the number sequence = 2, –4, 8, –16, 32, –64, ...

Find the common ratio:

Ratio between T2 and T1 = -4/2 = -2

Ratio between T3 and T2 = 8/-4 = -2

Ratio between T4 and T3 = -16/8 = -2

Ratio between T5 and T4 = -64/32 = -2

Answer: The common ration is -2

Answer 2

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