Question

If n is a natural number,then 9²n-4²n is always divisible by__

Answer 1

Answer:  5

Step-by-step explanation:

9²n - 4²n

= (9-4)²n

= 5²n

LET n=1

9² - 4²  = 81 - 16  = 65

65 is divisible by 5

Therefore , 9²n - 4²n will always be divisible by 5.

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