समीकरणों (3x+ay=7) और (6x+8y=20) का कोई हल न हो, इसके लिए (a) का मान क्या होगा?
For (3x+ay=7) and (6x+8y=20) to have no solution, what should be the value of (a)?
Explanation opens after your attempt
D. (a=4)
Concept
To make coefficients proportional, (3:6=a:8) must hold. This gives (a=4), and constants (7:20) are not in the same ratio.
Why this answer is correct
The correct answer is D. (a=4). To make coefficients proportional, (3:6=a:8) must hold. This gives (a=4), and constants (7:20) are not in the same ratio.
Exam Tip
गुणांक समानुपाती करने के लिए (3:6=a:8) होना चाहिए। इससे (a=4), और स्थिरांक (7:20) समान अनुपात में नहीं हैं।
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