Differentiability and Continuity of Function
Limits, Continuity and Differentiability

79959 The value of \(\lim _{x \rightarrow 0} \frac{\cosh x-\cos x}{x \sin x}\) is

1 \(\frac{1}{3}\)
2 2
3 1
4 \(\frac{1}{2}\)
Limits, Continuity and Differentiability

79960 Let \(f(x)=\left\{\begin{array}{rr}x^{n} \sin \frac{1}{x}, x \neq 0 \\ 0, x=0\end{array}\right\}\),
Then, \(f(x)\) is continuous but not differentiable at \(\mathrm{x}=\mathbf{0}\), if

1 \(\mathrm{n} \in(0,1)\)
2 \(\mathrm{n} \in[1, \infty)\)
3 \(\mathrm{n} \in(-\infty, 0)\)
4 \(\mathrm{n}=0\)
Limits, Continuity and Differentiability

79961 \(\lim _{x \rightarrow 0} \frac{x}{|x|+x^{2}}\) is equal to

1 1
2 -1
3 0
4 Does not exist
Limits, Continuity and Differentiability

79962 If \(a_{1}=1\) and \(a_{n+1}=\frac{4+3 a_{n}}{3+2 a_{n}}, n \geq 1\) and if \(\lim _{n \rightarrow \infty} a_{n}=a\), then the value of \(a\) is

1 \(\sqrt{2}\)
2 \(-\sqrt{2}\)
3 2
4 None of these
Limits, Continuity and Differentiability

79963 If \(f(x)=\left\{\begin{array}{l}-x^{2}, \quad \text { When } x \leq 0 \\ 5 x-4, \text { When } 0\lt x \leq 1 \\ 4 x^{2}-3 x, \text { When } 1\lt x\lt 2 \\ 3 x+4, \text { When } x \geq 2\end{array}\right.\)
then

1 \(f(x)\) is continuous at \(x=0\)
2 \(f(x)\) is continuous at \(x=2\)
3 \(f(x)\) is discontinuous at \(x=1\)
4 None of the above
Limits, Continuity and Differentiability

79959 The value of \(\lim _{x \rightarrow 0} \frac{\cosh x-\cos x}{x \sin x}\) is

1 \(\frac{1}{3}\)
2 2
3 1
4 \(\frac{1}{2}\)
Limits, Continuity and Differentiability

79960 Let \(f(x)=\left\{\begin{array}{rr}x^{n} \sin \frac{1}{x}, x \neq 0 \\ 0, x=0\end{array}\right\}\),
Then, \(f(x)\) is continuous but not differentiable at \(\mathrm{x}=\mathbf{0}\), if

1 \(\mathrm{n} \in(0,1)\)
2 \(\mathrm{n} \in[1, \infty)\)
3 \(\mathrm{n} \in(-\infty, 0)\)
4 \(\mathrm{n}=0\)
Limits, Continuity and Differentiability

79961 \(\lim _{x \rightarrow 0} \frac{x}{|x|+x^{2}}\) is equal to

1 1
2 -1
3 0
4 Does not exist
Limits, Continuity and Differentiability

79962 If \(a_{1}=1\) and \(a_{n+1}=\frac{4+3 a_{n}}{3+2 a_{n}}, n \geq 1\) and if \(\lim _{n \rightarrow \infty} a_{n}=a\), then the value of \(a\) is

1 \(\sqrt{2}\)
2 \(-\sqrt{2}\)
3 2
4 None of these
Limits, Continuity and Differentiability

79963 If \(f(x)=\left\{\begin{array}{l}-x^{2}, \quad \text { When } x \leq 0 \\ 5 x-4, \text { When } 0\lt x \leq 1 \\ 4 x^{2}-3 x, \text { When } 1\lt x\lt 2 \\ 3 x+4, \text { When } x \geq 2\end{array}\right.\)
then

1 \(f(x)\) is continuous at \(x=0\)
2 \(f(x)\) is continuous at \(x=2\)
3 \(f(x)\) is discontinuous at \(x=1\)
4 None of the above
Limits, Continuity and Differentiability

79959 The value of \(\lim _{x \rightarrow 0} \frac{\cosh x-\cos x}{x \sin x}\) is

1 \(\frac{1}{3}\)
2 2
3 1
4 \(\frac{1}{2}\)
Limits, Continuity and Differentiability

79960 Let \(f(x)=\left\{\begin{array}{rr}x^{n} \sin \frac{1}{x}, x \neq 0 \\ 0, x=0\end{array}\right\}\),
Then, \(f(x)\) is continuous but not differentiable at \(\mathrm{x}=\mathbf{0}\), if

1 \(\mathrm{n} \in(0,1)\)
2 \(\mathrm{n} \in[1, \infty)\)
3 \(\mathrm{n} \in(-\infty, 0)\)
4 \(\mathrm{n}=0\)
Limits, Continuity and Differentiability

79961 \(\lim _{x \rightarrow 0} \frac{x}{|x|+x^{2}}\) is equal to

1 1
2 -1
3 0
4 Does not exist
Limits, Continuity and Differentiability

79962 If \(a_{1}=1\) and \(a_{n+1}=\frac{4+3 a_{n}}{3+2 a_{n}}, n \geq 1\) and if \(\lim _{n \rightarrow \infty} a_{n}=a\), then the value of \(a\) is

1 \(\sqrt{2}\)
2 \(-\sqrt{2}\)
3 2
4 None of these
Limits, Continuity and Differentiability

79963 If \(f(x)=\left\{\begin{array}{l}-x^{2}, \quad \text { When } x \leq 0 \\ 5 x-4, \text { When } 0\lt x \leq 1 \\ 4 x^{2}-3 x, \text { When } 1\lt x\lt 2 \\ 3 x+4, \text { When } x \geq 2\end{array}\right.\)
then

1 \(f(x)\) is continuous at \(x=0\)
2 \(f(x)\) is continuous at \(x=2\)
3 \(f(x)\) is discontinuous at \(x=1\)
4 None of the above
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
Limits, Continuity and Differentiability

79959 The value of \(\lim _{x \rightarrow 0} \frac{\cosh x-\cos x}{x \sin x}\) is

1 \(\frac{1}{3}\)
2 2
3 1
4 \(\frac{1}{2}\)
Limits, Continuity and Differentiability

79960 Let \(f(x)=\left\{\begin{array}{rr}x^{n} \sin \frac{1}{x}, x \neq 0 \\ 0, x=0\end{array}\right\}\),
Then, \(f(x)\) is continuous but not differentiable at \(\mathrm{x}=\mathbf{0}\), if

1 \(\mathrm{n} \in(0,1)\)
2 \(\mathrm{n} \in[1, \infty)\)
3 \(\mathrm{n} \in(-\infty, 0)\)
4 \(\mathrm{n}=0\)
Limits, Continuity and Differentiability

79961 \(\lim _{x \rightarrow 0} \frac{x}{|x|+x^{2}}\) is equal to

1 1
2 -1
3 0
4 Does not exist
Limits, Continuity and Differentiability

79962 If \(a_{1}=1\) and \(a_{n+1}=\frac{4+3 a_{n}}{3+2 a_{n}}, n \geq 1\) and if \(\lim _{n \rightarrow \infty} a_{n}=a\), then the value of \(a\) is

1 \(\sqrt{2}\)
2 \(-\sqrt{2}\)
3 2
4 None of these
Limits, Continuity and Differentiability

79963 If \(f(x)=\left\{\begin{array}{l}-x^{2}, \quad \text { When } x \leq 0 \\ 5 x-4, \text { When } 0\lt x \leq 1 \\ 4 x^{2}-3 x, \text { When } 1\lt x\lt 2 \\ 3 x+4, \text { When } x \geq 2\end{array}\right.\)
then

1 \(f(x)\) is continuous at \(x=0\)
2 \(f(x)\) is continuous at \(x=2\)
3 \(f(x)\) is discontinuous at \(x=1\)
4 None of the above
Limits, Continuity and Differentiability

79959 The value of \(\lim _{x \rightarrow 0} \frac{\cosh x-\cos x}{x \sin x}\) is

1 \(\frac{1}{3}\)
2 2
3 1
4 \(\frac{1}{2}\)
Limits, Continuity and Differentiability

79960 Let \(f(x)=\left\{\begin{array}{rr}x^{n} \sin \frac{1}{x}, x \neq 0 \\ 0, x=0\end{array}\right\}\),
Then, \(f(x)\) is continuous but not differentiable at \(\mathrm{x}=\mathbf{0}\), if

1 \(\mathrm{n} \in(0,1)\)
2 \(\mathrm{n} \in[1, \infty)\)
3 \(\mathrm{n} \in(-\infty, 0)\)
4 \(\mathrm{n}=0\)
Limits, Continuity and Differentiability

79961 \(\lim _{x \rightarrow 0} \frac{x}{|x|+x^{2}}\) is equal to

1 1
2 -1
3 0
4 Does not exist
Limits, Continuity and Differentiability

79962 If \(a_{1}=1\) and \(a_{n+1}=\frac{4+3 a_{n}}{3+2 a_{n}}, n \geq 1\) and if \(\lim _{n \rightarrow \infty} a_{n}=a\), then the value of \(a\) is

1 \(\sqrt{2}\)
2 \(-\sqrt{2}\)
3 2
4 None of these
Limits, Continuity and Differentiability

79963 If \(f(x)=\left\{\begin{array}{l}-x^{2}, \quad \text { When } x \leq 0 \\ 5 x-4, \text { When } 0\lt x \leq 1 \\ 4 x^{2}-3 x, \text { When } 1\lt x\lt 2 \\ 3 x+4, \text { When } x \geq 2\end{array}\right.\)
then

1 \(f(x)\) is continuous at \(x=0\)
2 \(f(x)\) is continuous at \(x=2\)
3 \(f(x)\) is discontinuous at \(x=1\)
4 None of the above