समीकरण (3x+ay=21) और (9x+12y=63) के अनंत हल होने के लिए (a) क्या होगा?
What will (a) be for (3x+ay=21) and (9x+12y=63) to have infinitely many solutions?
Explanation opens after your attempt
C. (4)
Concept
For infinitely many solutions, (3/9=a/12=21/63) must hold. Therefore, (a=4).
Why this answer is correct
The correct answer is C. (4). For infinitely many solutions, (3/9=a/12=21/63) must hold. Therefore, (a=4).
Exam Tip
अनंत हल के लिए (3/9=a/12=21/63) होना चाहिए। इसलिए (a=4) है।
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