Q. 3 F4.7( 6 Votes )

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

3, -3^{2}, 3^{3}…….

Answer :

Here first term is (a) = 3

r_{1} =

r_{2} =

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

a_{4} = a r^{3} = 3×(-3)^{3} = 3 × -27 = -81

a_{5} = a r^{4} = 3×(-3)^{4} = 3 × 81 = 243

a_{6} = a r^{5} = 3×(-3)^{5} = 3 × -243 = -729

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