Q3 of 105 Page 152

Which of the following are GP? If they are in GP. Write three more terms?

First term is (a) =

r1 = = -2√2


r2 = -2√2


Common ratios are equal so the given series is in GP.


a4 = a r3 = (-2√2)3 = -16


a5 = a r4 = (-2√2)4 = 32√2


a6 = a r5 = (-2√2)5 = -128


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