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If f: R R is defined by f(x)=x³ , then f⁻¹(8)=

Options

  1. A2
  2. B2,2 , 2 ²
  3. C2,2
  4. D2,2

Correct answer

A. 2

Step-by-step solution

Let f⁻¹(8)=x array lrlrl & & & f(x) & =8 & & x³ & =8 & & x & =2 & & & f⁻¹(8) & = 2 array x=2 [ x R]

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