Concept-wise Practice

exponential square MCQ Questions for Class 12

exponential square se related questions ko ek jagah revise karein. Har question me bilingual content, answer feedback aur explanation available hai.

Practice Questions

1 questions tagged with exponential square.

फलन \(f:\mathbb{R}\to[0,\infty\)), (f(x)=\(e^x-1\)2), सर्वाच्छादक है या नहीं?

Is \(f:\mathbb{R}\to[0,\infty\)), (f(x)=\(e^x-1\)2), onto or not?

Explanation opens after your attempt
Correct Answer

A. सर्वाच्छादक हैIt is onto

Step 1

Concept

(\(e^x-1\)2\ge0), and at (x=0), the value is (0).

Step 2

Why this answer is correct

For any \(y\ge0\), set \(e^x-1=\sqrt{y}\), giving (x=\ln\(1+\sqrt{y}\)), which is real.

Step 3

Exam Tip

For exponential expressions, logarithms help construct preimages. चरण 1: (\(e^x-1\)2\ge0) और (x=0) पर (0) मिलता है। चरण 2: किसी भी \(y\ge0\) के लिए \(e^x-1=\sqrt{y}\) लेने पर (x=\ln\(1+\sqrt{y}\)) वास्तविक मिलता है। चरण 3: घातीय फलन में धनात्मक पूर्वप्रतिबिंब बनाने के लिए लघुगणक का प्रयोग करें।

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