समीकरण (4x+by=28) और (12x+21y=84) के अनंत हल होने के लिए (b) का मान क्या है?

What is the value of (b) for (4x+by=28) and (12x+21y=84) to have infinitely many solutions?

Explanation opens after your attempt
Correct Answer

C. (7)

Step 1

Concept

For infinitely many solutions, (4/12=b/21=28/84) must hold. Therefore, (b=7).

Step 2

Why this answer is correct

The correct answer is C. (7). For infinitely many solutions, (4/12=b/21=28/84) must hold. Therefore, (b=7).

Step 3

Exam Tip

अनंत हल के लिए (4/12=b/21=28/84) होना चाहिए। इसलिए (b=7) होगा।

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समीकरण (4x+by=28) और (12x+21y=84) के अनंत हल होने के लिए (b) का मान क्या है? / What is the value of (b) for (4x+by=28) and (12x+21y=84) to have infinitely many solutions?

Correct Answer: C. (7). Explanation: अनंत हल के लिए (4/12=b/21=28/84) होना चाहिए। इसलिए (b=7) होगा। / For infinitely many solutions, (4/12=b/21=28/84) must hold. Therefore, (b=7).

Which concept should I revise for this Mathematics MCQ?

For infinitely many solutions, (4/12=b/21=28/84) must hold. Therefore, (b=7).

What exam hint can help solve this Mathematics question?

अनंत हल के लिए (4/12=b/21=28/84) होना चाहिए। इसलिए (b=7) होगा।