समीकरण (3x+by=15) और (9x+12y=45) के अनंत हल होने के लिए (b) क्या होगा?
What will (b) be for (3x+by=15) and (9x+12y=45) to have infinitely many solutions?
Explanation opens after your attempt
C. (4)
Concept
For infinitely many solutions, (3/9=b/12=15/45) must hold. Therefore, (b=4).
Why this answer is correct
The correct answer is C. (4). For infinitely many solutions, (3/9=b/12=15/45) must hold. Therefore, (b=4).
Exam Tip
अनंत हल के लिए (3/9=b/12=15/45) होना चाहिए। इसलिए (b=4) है।
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