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प्रश्न
Write an expression for the sum of 1 and twice a number n. If you let n be any odd number, will the result always be an odd number?
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उत्तर
Let the number be n
So, according to the statement, the expression can be written as = 2n + 1
Yes, the result is always an odd number, because when a number becomes multiplied by 2, it becomes even and addition of 1 in that even number makes it an odd number.
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