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CBSE Past Year MCQ Quiz - Chapter 5 Class 12 Continuity and Differentiability

Chapter 5 Class 12 Continuity and Differentiability | 3 questions

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Question 1 of 3
Question 1 of 3
CBSE Board Exam 2025
Assertion (A) : \(\mathrm{f}(x)=\left\{\begin{array}{cc}3 x-8, & x \leq 5 \\ 2 \mathrm{k}, & x>5\end{array}\right.\) is continuous at \(x=5\) for \(\mathrm{k}=\frac{5}{2}\).
Reason (R) : For a function f to be continuous at \(x=\mathrm{a}\),

$$ \lim _{x \rightarrow \mathrm{a}^{-}} \mathrm{f}(x)=\lim _{x \rightarrow \mathrm{a}^{+}} \mathrm{f}(x)=\mathrm{f}(\mathrm{a}) $$
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Question 2 of 3
CBSE Board Exam 2026
If \(x+y=x y\), then \(\frac{d y}{d x}\) is
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Question 3 of 3
CBSE Board Exam 2026
If \(f(x)=\left\{\begin{array}{cc}\frac{x^2-4 x-5}{x+1}, & x \neq-1 \\ k, & x=-1\end{array}\right.\) is continuous at \(\mathrm{x}=-1\), then the value of k is :
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