यदि (f(x)=x-2-3) और (f(a)=13), जहाँ (a>0), तो (a) क्या होगा?

If (f(x)=x-2-3) and (f(a)=13), where (a>0), what is (a)?

Explanation opens after your attempt
Correct Answer

A. (4)

Step 1

Concept

(f(a)=a-2-3).

Step 2

Why this answer is correct

From \(a^2-3=13\), we get \(a^2=16\).

Step 3

Exam Tip

Since (a>0), (a=4). चरण 1: (f(a)=a-2-3) है। चरण 2: \(a^2-3=13\) से \(a^2=16\)। चरण 3: (a>0) दिया है, इसलिए (a=4)।

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Mathematics Answer, Explanation and Revision Hints

यदि (f(x)=x-2-3) और (f(a)=13), जहाँ (a>0), तो (a) क्या होगा? / If (f(x)=x-2-3) and (f(a)=13), where (a>0), what is (a)?

Correct Answer: A. (4). Explanation: चरण 1: (f(a)=a-2-3) है। चरण 2: \(a^2-3=13\) से \(a^2=16\)। चरण 3: (a>0) दिया है, इसलिए (a=4)। / Step 1: (f(a)=a-2-3). Step 2: From \(a^2-3=13\), we get \(a^2=16\). Step 3: Since (a>0), (a=4).

Which concept should I revise for this Mathematics MCQ?

(f(a)=a-2-3).

What exam hint can help solve this Mathematics question?

Since (a>0), (a=4). चरण 1: (f(a)=a-2-3) है। चरण 2: \(a^2-3=13\) से \(a^2=16\)। चरण 3: (a>0) दिया है, इसलिए (a=4)।