समीकरणों (9x+qy=36) और (18x+14y=72) के अनंत हल होने के लिए (q) का मान क्या है?

What is the value of (q) for the equations (9x+qy=36) and (18x+14y=72) to have infinitely many solutions?

Explanation opens after your attempt
Correct Answer

C. (7)

Step 1

Concept

The second equation is (2) times the first, so (q/14=1/2) must hold. Hence, (q=7).

Step 2

Why this answer is correct

The correct answer is C. (7). The second equation is (2) times the first, so (q/14=1/2) must hold. Hence, (q=7).

Step 3

Exam Tip

दूसरा समीकरण पहले का (2) गुना है, इसलिए (q/14=1/2) होना चाहिए। अतः (q=7)।

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Mathematics Answer, Explanation and Revision Hints

समीकरणों (9x+qy=36) और (18x+14y=72) के अनंत हल होने के लिए (q) का मान क्या है? / What is the value of (q) for the equations (9x+qy=36) and (18x+14y=72) to have infinitely many solutions?

Correct Answer: C. (7). Explanation: दूसरा समीकरण पहले का (2) गुना है, इसलिए (q/14=1/2) होना चाहिए। अतः (q=7)। / The second equation is (2) times the first, so (q/14=1/2) must hold. Hence, (q=7).

Which concept should I revise for this Mathematics MCQ?

The second equation is (2) times the first, so (q/14=1/2) must hold. Hence, (q=7).

What exam hint can help solve this Mathematics question?

दूसरा समीकरण पहले का (2) गुना है, इसलिए (q/14=1/2) होना चाहिए। अतः (q=7)।