Medium Math Class 11 Level 2

If f(x)=x²-1 then what is the positive value of f⁻¹(8)?

यदि f(x)=x²-1 है तो f⁻¹(8) का positive मान क्या होगा?

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Correct Answer

B. 3 / 3

Explanation

Step 1: For f⁻¹(8) write x²-1=8. Step 2: x²=9 so the positive value x=3. Step 3: For inverse value set output equal to function.

Step 1: f⁻¹(8) के लिए x²-1=8 लिखें। Step 2: x²=9 इसलिए positive x=3 है। Step 3: Inverse value में output को function के बराबर रखें।

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