यदि (f(x)=\sqrt{x+4}) और (g(x)=\frac{1}{x-1}) हैं तो ((fg)(x)) का प्रांत क्या होगा?
If (f(x)=\sqrt{x+4}) and (g(x)=\frac{1}{x-1}) then what will be the domain of ((fg)(x))?
Explanation opens after your attempt
A. \([-4,\infty)-{1})
Concept
The square root gives \(x\ge -4\) and the denominator gives \(x\ne 1\). The domain of a product is the intersection of both domains.
Why this answer is correct
The correct answer is A. \([-4,\infty)-{1}). The square root gives \(x\ge -4\) and the denominator gives \(x\ne 1\). The domain of a product is the intersection of both domains.
Exam Tip
वर्गमूल से \(x\ge -4\) और हर से \(x\ne 1\)। गुणन का प्रांत दोनों प्रांतों का प्रतिच्छेद होता है।
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