यदि (3x+ky=21) और (12x+20y=84) अनंत समाधान देते हैं, तो (k) का मान क्या है?
If (3x+ky=21) and (12x+20y=84) give infinitely many solutions, what is the value of (k)?
Explanation opens after your attempt
C. (5)
Concept
The second equation is (4) times the first, so (4k=20) and (k=5). For infinite solutions, the lines must be coincident.
Why this answer is correct
The correct answer is C. (5). The second equation is (4) times the first, so (4k=20) and (k=5). For infinite solutions, the lines must be coincident.
Exam Tip
दूसरा समीकरण पहले का (4) गुना है, इसलिए (4k=20) और (k=5)। अनंत समाधान के लिए रेखाएं संपाती होनी चाहिए।
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