Concept-wise Practice

function operations MCQ Questions for Class 12

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

Practice Questions

3 questions tagged with function operations.

यदि (f(x)=3x) और (g(x)=x+1), तो ((f-g)(x)) क्या होगा?

If (f(x)=3x) and (g(x)=x+1), what is ((f-g)(x))?

Explanation opens after your attempt
Correct Answer

A. (2x-1)

Step 1

Concept

((f-g)(x)=f(x)-g(x)).

Step 2

Why this answer is correct

(3x-(x+1)=3x-x-1).

Step 3

Exam Tip

Simplifying gives (2x-1). चरण 1: ((f-g)(x)=f(x)-g(x))। चरण 2: (3x-(x+1)=3x-x-1)। चरण 3: सरल करने पर (2x-1) मिलता है।

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यदि (f(x)=x-2) और (g(x)=x), तो ((fg)(2)) क्या होगा?

If (f(x)=x-2) and (g(x)=x), what is ((fg)(2))?

Explanation opens after your attempt
Correct Answer

A. (8)

Step 1

Concept

((fg)(x)=f(x)g(x)).

Step 2

Why this answer is correct

(f(2)=4) and (g(2)=2).

Step 3

Exam Tip

Therefore ((fg)(2)=4\cdot2=8). चरण 1: ((fg)(x)=f(x)g(x)) होता है। चरण 2: (f(2)=4) और (g(2)=2)। चरण 3: इसलिए ((fg)(2)=4\cdot2=8)।

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यदि (f(x)=2x) और (g(x)=x-1), तो ((f+g)(x)) क्या होगा?

If (f(x)=2x) and (g(x)=x-1), what is ((f+g)(x))?

Explanation opens after your attempt
Correct Answer

A. (3x-1)

Step 1

Concept

((f+g)(x)=f(x)+g(x)).

Step 2

Why this answer is correct

(2x+(x-1)=3x-1).

Step 3

Exam Tip

In the sum of functions, add their values. चरण 1: ((f+g)(x)=f(x)+g(x)) होता है। चरण 2: (2x+(x-1)=3x-1)। चरण 3: फलनों के योग में उनके मानों को जोड़ा जाता है।

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