समीकरणों (7x+ay=49) और (21x+18y=147) के अनंत हल होने के लिए (a) क्या होगा?
What will (a) be for the equations (7x+ay=49) and (21x+18y=147) to have infinitely many solutions?
Explanation opens after your attempt
C. (6)
Concept
For infinitely many solutions, (7/21=a/18=49/147) must hold. This gives (a=6).
Why this answer is correct
The correct answer is C. (6). For infinitely many solutions, (7/21=a/18=49/147) must hold. This gives (a=6).
Exam Tip
अनंत हल के लिए (7/21=a/18=49/147) होना चाहिए। इससे (a=6) मिलता है।
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