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