समीकरणों (2x+3y=8) और (5x+ky=19) का अद्वितीय हल होने के लिए कौन-सी शर्त सही है?
Which condition is correct for the equations (2x+3y=8) and (5x+ky=19) to have a unique solution?
Explanation opens after your attempt
D. (k \ne 152)
Concept
For a unique solution, \(2/5 \ne 3/k\) must hold. Therefore, \(k \ne 15/2\) is the correct condition.
Why this answer is correct
The correct answer is D. \(k \ne 15 / 2\). For a unique solution, \(2/5 \ne 3/k\) must hold. Therefore, \(k \ne 15/2\) is the correct condition.
Exam Tip
अद्वितीय हल के लिए \(2/5 \ne 3/k\) होना चाहिए। इसलिए \(k \ne 15/2\) सही शर्त है।
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