If 9 power 7 + 7 power 9 is divisible by 4 power n , then the greatest value of n is
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Step-by-step explanation:
79+97=(8−1)9+(8+1)7
=[9C089−9C188+9C287−.....+9C881−9C9(1)]+[7C087+7C186+7C285+.....+7C681+7C7(1)]
=8
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