यदि (f(x)=\sqrt{x+2}) है, तो (f(x)=3) के लिए (x) क्या होगा?

If (f(x)=\sqrt{x+2}), what is (x) when (f(x)=3)?

Explanation opens after your attempt
Correct Answer

A. (7)

Step 1

Concept

\(\sqrt{x+2}=3\) gives (x+2=9) and (x=7). In exams keep the domain condition valid after squaring.

Step 2

Why this answer is correct

The correct answer is A. (7). \(\sqrt{x+2}=3\) gives (x+2=9) and (x=7). In exams keep the domain condition valid after squaring.

Step 3

Exam Tip

\(\sqrt{x+2}=3\) से (x+2=9) और (x=7) मिलता है। परीक्षा में वर्ग करने के बाद domain condition भी सही रखें।

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Mathematics Answer, Explanation and Revision Hints

यदि (f(x)=\sqrt{x+2}) है, तो (f(x)=3) के लिए (x) क्या होगा? / If (f(x)=\sqrt{x+2}), what is (x) when (f(x)=3)?

Correct Answer: A. (7). Explanation: \(\sqrt{x+2}=3\) से (x+2=9) और (x=7) मिलता है। परीक्षा में वर्ग करने के बाद domain condition भी सही रखें। / \(\sqrt{x+2}=3\) gives (x+2=9) and (x=7). In exams keep the domain condition valid after squaring.

Which concept should I revise for this Mathematics MCQ?

\(\sqrt{x+2}=3\) gives (x+2=9) and (x=7). In exams keep the domain condition valid after squaring.

What exam hint can help solve this Mathematics question?

\(\sqrt{x+2}=3\) से (x+2=9) और (x=7) मिलता है। परीक्षा में वर्ग करने के बाद domain condition भी सही रखें।