Question
Download Solution PDFIf \(\rm x^{-\frac{4}{5}}=81\) then x = ?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven:
x-4/5 = 81
Formula used:
To solve for x: x-n = a ⟹ x = a-1/n
Calculation:
x-4/5 = 81
⇒ x = 81-1/(-4/5)
⇒ x = 815/4
⇒ x = (34)5/4
⇒ x = 3(4×5/4)
⇒ x = 35
⇒ x = 243
∴ The correct answer is option (2).
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