Question 173

What comes in place of the question mark (?)

$$8^{7.999}\times64^{13.012}=8^?$$

Solution
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The expression can be written as $$8^8 * 64^13$$

= $$8^8 * (8^2)^{13} = 8^{8 + 2*13} = 8^{34}$$

So, ? = 34

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