Practice focused topic-wise MCQs with answers and explanations for quick revision and exam preparation.
Difficulty select karke sirf is topic ke focused MCQs practice karein. Score, timer aur explanations student-friendly flow me milenge.
Showing 331-340 of 600 questions.
What is the domain of (f(x)=\sqrt{x+3}+\sqrt{5-x})?
A. ([-3,5])
दोनों वर्गमूलों के लिए \(x+3\ge 0\) और \(5-x\ge 0\) साथ-साथ चाहिए। संयुक्त शर्तों का प्रतिच्छेद लें। / Both square roots require \(x+3\ge 0\) and \(5-x\ge 0\) simultaneously. Take the intersection of the conditions.
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What is the domain of (f(x)=\frac{1}{\sqrt{x+1}}+\sqrt{4-x})?
A. ((-1,4])
पहले भाग से (x+1>0) और दूसरे से \(4-x\ge 0\) चाहिए। अतः संयुक्त प्रांत ((-1,4]) है। / The first part requires (x+1>0), and the second requires \(4-x\ge 0\). Hence the combined domain is ((-1,4]).
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What is the domain of (f(x)=\sqrt{\frac{x+3}{2-x}})?
A. ([-3,2))
\(\frac{x+3}{2-x}\ge 0\) और \(x\ne 2\) चाहिए। शून्य अंश से आ सकता है पर हर से नहीं। / We need \(\frac{x+3}{2-x}\ge 0\) and \(x\ne 2\). Zero may come from the numerator but not from the denominator.
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If (f(x)=\frac{1}{x-1}+\frac{1}{x+2}), what is the domain?
A. \(\mathbb{R}\setminus{1,-2}\)
दोनों हर अलग-अलग शून्य नहीं होने चाहिए। इसलिए (x=1) और (x=-2) हटेंगे। / Both denominators must be non-zero. Therefore (x=1) and (x=-2) are excluded.
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What is the domain of (f(x)=\frac{\sqrt{x-1}}{x-5})?
A. ([1,5)\cup\(5,\infty\))
\(\sqrt{x-1}\) के लिए \(x\ge 1\) और हर के लिए \(x\ne 5\) चाहिए। दोनों शर्तें साथ लागू करें। / The square root requires \(x\ge 1\), and the denominator requires \(x\ne 5\). Apply both conditions together.
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If (f(x)=\sqrt{x-2+6x+8}), what is the domain?
A. (\(-\infty,-4]\cup[-2,\infty\))
(x-2+6x+8=(x+4)(x+2)) और यह शून्य या धनात्मक चाहिए। बाहर के अंतराल सही हैं। / Here (x-2+6x+8=(x+4)(x+2)), and it must be non-negative. The outer intervals are correct.
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Which value is not in the domain of (f(x)=\frac{1}{x-2-5x+6})?
A. (x=2)
हर (x-2-5x+6=(x-2)(x-3)) है इसलिए (x=2) और (x=3) हटते हैं। विकल्पों में केवल (x=2) दिया है। / The denominator (x-2-5x+6=(x-2)(x-3)), so (x=2) and (x=3) are excluded. Among the options, only (x=2) appears.
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If (f(x)=\frac{3}{x-2+2x+5}), what is the maximum value of (f)?
A. \(\frac{3}{4}\)
हर (x-2+2x+5=(x+1)2+4) का न्यूनतम मान (4) है। धनात्मक भिन्न का अधिकतम हर के न्यूनतम पर मिलता है। / The denominator (x-2+2x+5=(x+1)2+4) has minimum value (4). A positive fraction is maximum when its denominator is minimum.
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If (f(x)=\frac{2}{(x+3)2+1}-4), what is the range?
A. ((-4,-2])
(\frac{2}{(x+3)2+1}) का परिसर ((0,2]) है। इसमें (-4) जोड़ने पर परिसर ((-4,-2]) मिलता है। / The range of (\frac{2}{(x+3)2+1}) is ((0,2]). Adding (-4) gives ((-4,-2]).
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What is the range of (f(x)=|x+2|-|x-2|)?
A. ([-4,4])
टुकड़ों में देखने पर \(x\le -2\) पर मान (-4), \(x\ge 2\) पर (4), और बीच में (2x) मिलता है। इसलिए सभी मान ([-4,4]) आते हैं। / Piecewise checking gives (-4) for \(x\le -2\), (4) for \(x\ge 2\), and (2x) between them. Hence all values in ([-4,4]) occur.
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