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प्रश्न
Identify the following sequence is in G.P.?
1, −5, 25, −125, ...
बेरीज
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उत्तर
1, −5, 25, −125, ...
r = `("t"_2)/("t"_1) = (-5)/1` = −5
r = `("t"_3)/("t"_2) = 25/(-5)`= −5
−5 = −5
∴ It is a G.P.
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