समीकरण (7x+ay=21) और (x+2y=3) के अनंत हल के लिए (a) क्या होगा?
What will (a) be for infinitely many solutions of (7x+ay=21) and (x+2y=3)?
Explanation opens after your attempt
C. (14)
Concept
The first equation must be (7) times the second so (a=14). Then both equations represent the same line.
Why this answer is correct
The correct answer is C. (14). The first equation must be (7) times the second so (a=14). Then both equations represent the same line.
Exam Tip
पहला समीकरण दूसरे का (7) गुना होना चाहिए इसलिए (a=14)। इससे दोनों समीकरण एक ही रेखा दर्शाते हैं।
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