How do you calculate a^5 x a^16 / a^4?
When each term has the same base, add the indices that are multiplied. Then subtract the indices that are divided.
a^5 x a^16 / a^ 4 = a^(5+16) / a^4
= a^ 21 / a^4
= a^(21-4)
= a^17
EP
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