साइनम फलन (f(x)=\operatorname{sgn}(5-x)) में (x=7) पर मान क्या है?
What is the value of (f(x)=\operatorname{sgn}(5-x)) at (x=7)?
Explanation opens after your attempt
A. (-1)
Concept
At (x=7), (5-x=-2), which is negative. The signum function gives (-1) for a negative input.
Why this answer is correct
The correct answer is A. (-1). At (x=7), (5-x=-2), which is negative. The signum function gives (-1) for a negative input.
Exam Tip
(x=7) पर (5-x=-2) ऋणात्मक है। साइनम फलन ऋणात्मक इनपुट पर (-1) देता है।
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