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Question

We can express (50−1)49 as(50−1)49=5k−1


A

True

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B

False

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Solution

The correct option is A

True


(501)49=49C0(50)4949C1(50)48+49C2(50)47............49C48(50)149C49

49C0(50)4949C1(50)48+49C2(50)47............49×(50)1 is multiple of 5.We will replace it by 5k.

(501)49=5k1


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