Question

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Answer 1

The value of r will be

`r {}^(17)`

Explanation:

Greetings!!!!

The given expression

`\frac{(r {}^(4) ) {}^(5) }{r{}^(3) }`

simplify

`(r {}^(4) ) {}^(5) = r{}^(20)`

Apply exponent rule

`\frac{(x) {}^(a) }{(x) {}^(b) } = x {}^(a - b)`

Thus,

`= r {}^(20 - 3)`

subtract the numbers: 20-3= 17

`= r {}^(17)`

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