Q. 145.0( 1 Vote )

# The sequence –3, –3, –3,… isA. an A.P. onlyB. a G.P. onlyC. neither A.P. nor G.PD. both A.P. and G.P.

The given sequence is -3, -3, -3

Test for AP

If a,b,c…are in AP the b-a = c-b…

-3-(-3) = -3-(-3) = 0

Therefore, the series is in AP.

Test for GP

If a,b,c.. are in GP then

Therefore, the series is in GP.

The series is both in AP and GP.

So the correct option is D.

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