Concept-wise Practice

nonnegative MCQ Questions for Class 12

nonnegative 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 nonnegative.

यदि \(f:\mathbb{R}\to[2,\infty\)), (f(x)=x-2+2) है, तो सही कथन कौन-सा है?

If \(f:\mathbb{R}\to[2,\infty\)), (f(x)=x-2+2), which statement is correct?

Explanation opens after your attempt
Correct Answer

A. यह आच्छादी हैIt is onto

Step 1

Concept

\(x^2\ge0\), so \(x^2+2\ge2\).

Step 2

Why this answer is correct

For every \(y\ge2\), take \(x=\sqrt{y-2}\), then (f(x)=y).

Step 3

Exam Tip

The range \([2,\infty\)) equals the codomain. चरण 1: \(x^2\ge0\), इसलिए \(x^2+2\ge2\)। चरण 2: हर \(y\ge2\) के लिए \(x=\sqrt{y-2}\) लेने पर (f(x)=y) मिलता है। चरण 3: परास \([2,\infty\)) और सहप्रांत समान हैं।

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