किस असमता का हल \(\mathbb{R}\) में (\(-\infty,\infty\)) है?
Which inequality has solution (\(-\infty,\infty\)) in \(\mathbb{R}\)?
Explanation opens after your attempt
C. \(7x-4\leq 7x+9\)
Concept
From \(7x-4\leq 7x+9\), we get \(-4\leq 9\), which is always true. Therefore every real (x) is a solution.
Why this answer is correct
The correct answer is C. \(7x-4\leq 7x+9\). From \(7x-4\leq 7x+9\), we get \(-4\leq 9\), which is always true. Therefore every real (x) is a solution.
Exam Tip
\(7x-4\leq 7x+9\) से \(-4\leq 9\) मिलता है जो हमेशा सत्य है। इसलिए हर वास्तविक (x) हल है।
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