UPSC NDA I 2019 Mathematics Solved Paper

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Question : 31 of 120

Marks: +1, -0

What is the nth term of the sequence 25−125, 625,−3125, .....?

[NDA I 2019]

(−5)‌2n−1
(−1))‌2n 5‌n+1
(−1))‌2n−1 5‌n+1
(−1))‌n−1 5‌n+1

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