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प्रश्न
Show that there is no value of n for which `(2^n xx 5^n)` ends in 5.
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उत्तर
We can write:
`(2^n xx 5^n)` = (2 × 5) n
= `10^n`
For any value of n, we get 0 in the end.
Thus, there is no value of n for which `(2^n xx 5^n)` ends in 5.
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