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Question

The value of (1216)13 is
.

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Solution

Need to Find:––––––––––––––– (1216)13.

To eliminate the negative sign from the exponent, we would take the fraction's (base) reciprocal.

(1216)13=(216)13
[(ab)n=(ba)n]

Now, as we know that 216=6×6×6=63, we can write:
(216)13
=(63)13
=63×13
((am)n=am×n)
=61
(216)13=(1216)13=6–––––––––––––––––––––––––––

Hence, the value of (1216)13 is 6.


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