फलन (f(x)=\operatorname{sgn}(x+7)) किस (x) पर शून्य होता है?
At which (x)-value does (f(x)=\operatorname{sgn}(x+7)) become zero?
Explanation opens after your attempt
Correct Answer
A. (x=-7)
Concept
The signum function is zero when the inside expression is zero. From (x+7=0), we get (x=-7).
Why this answer is correct
The correct answer is A. (x=-7). The signum function is zero when the inside expression is zero. From (x+7=0), we get (x=-7).
Exam Tip
साइनम फलन शून्य तब होता है जब अंदर की राशि शून्य हो। (x+7=0) से (x=-7) मिलता है।
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