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Syllabus

limEvaluate:_{x--> -2}(x^{3}-7x - 6) / (x^{4}+5x - 6)f(x) = [x] sin(πx) atx = k, kis an integer is(a) (–1)

^{k}(k– 1)π (b) (–1)^{k – 1}(k– 1)π (c) (–1)^{k}kπ (d) (–1)^{k – 1}kπ1. g is not defined at x=0

2. g is not continuous at x=0

3. The limit of g(x) as x approaches 0 equals 1

4. g'(0)=1

Q). $\underset{x\to \infty}{\mathrm{lim}}\sqrt{{x}^{2}+x+1}-\sqrt{{x}^{2}-x-1}$

1. 1

2. -2

3. 2/3

4. -2/3

$Find\underset{x\to {2}^{-}}{\mathrm{lim}}\frac{\left[x\right]-x}{2-x},where\left[x\right]isthegreatestintegervalueofx.\phantom{\rule{0ex}{0ex}}\phantom{\rule{0ex}{0ex}}1.\u25cb-1/2\phantom{\rule{0ex}{0ex}}2.\u25cb1/2\phantom{\rule{0ex}{0ex}}3.\u25cb\infty \phantom{\rule{0ex}{0ex}}4.\u25cb-\infty $

$f\left(x\right)=\left\{\begin{array}{l}\frac{{x}^{2}+3x-10}{x-2},x\ne 2\\ 10,x=2\end{array}\right.$

1. $\left(-\infty ,2\right)$

2. $\left(2,\infty \right)$

3. $\left(-\infty ,\infty \right)$

4. $\left(-\infty ,2\right)and\left(2,\infty \right)$

(cosx +cos 3x + cos5x…cos(2n-1)x)/nwhere n is turning to infinity(n[a.0b.infinity c. 1 d.-1]^{p}sin^{2}(n!))/(n+1) n-> infinity^{,}(x) if f (x) = tan^{-1}$\sqrt{x}$$\left(1\right)\frac{2}{\sqrt{x}(1+z)}\phantom{\rule{0ex}{0ex}}\left(2\right)\frac{1}{2\sqrt{x}(1+x)}\phantom{\rule{0ex}{0ex}}\left(3\right)\frac{1}{2\sqrt{x+1}}\phantom{\rule{0ex}{0ex}}\left(4\right)Noneofthese$

^{- }e^{(1/xlogx)}Q). $\underset{x\to 2}{\mathrm{lim}}\frac{{x}^{2}-3x+2}{x-2}$

1. 0

2. -2/3

3 3

4. 1

I don't know why it is a function as the graph is not continuous. For the value of x to be π/2 i.e., tan π/2, the value of the y goes to positive infinity from left-hand side and the negative infinity from the right-hand side. Moreover, there is asymptote at x = π/2, and thus even there does not exist any limit.

question no.8

Q. Determine the intervals on which the given function is continuous:

$f\left(x\right)=\left\{\begin{array}{l}\frac{{x}^{2}+3x-10}{x-2},x\ne 2\\ 10,x\ne 2\end{array}\right.$

1. $\left(-\infty ,2\right)$

2. $\left(2,\infty \right)$

3. $\left(-\infty ,\infty \right)$

4. $\left(-\infty ,2\right)and\left(2,\infty \right)$

(a) 0

(b) $\frac{64}{27}$

(c) $\frac{8}{3}$

(d) none of these

$Find\frac{dy}{dx},ify=12\left(1-cott\right),x=10\left(t-\mathrm{sin}t\right),-\frac{\mathrm{\pi}}{2}t\frac{\mathrm{\pi}}{2}\phantom{\rule{0ex}{0ex}}\phantom{\rule{0ex}{0ex}}1.\u25cb\mathrm{tan}\frac{t}{4}\phantom{\rule{0ex}{0ex}}\phantom{\rule{0ex}{0ex}}2.\u25cb3\mathrm{cos}\frac{t}{2}\phantom{\rule{0ex}{0ex}}\phantom{\rule{0ex}{0ex}}3.\u25cb\frac{6}{5}cot\frac{t}{2}\phantom{\rule{0ex}{0ex}}\phantom{\rule{0ex}{0ex}}4.\u25cb2\mathrm{sin}t$

^{2}+x^{3}+...+x^{n}is equal to 1-x^{n}/1-x1. -1

2. 1

3. 2

4. -2

$4.\underset{x\to 0}{L\mathrm{im}}\frac{{27}^{x}-{9}^{x}-{3}^{x}+1}{\sqrt{2}-\sqrt{1+\mathrm{cos}x}}\phantom{\rule{0ex}{0ex}}\left(A\right)4\sqrt{2}{\left(\mathrm{ln}3\right)}^{2}\left(B\right)8\sqrt{2}(\mathrm{ln}3{)}^{2}(C)4\sqrt{2}\left(\mathrm{ln}3\right)(D)8\sqrt{2}\left(\mathrm{ln}3\right)$

$\left(1\right)-1/2\phantom{\rule{0ex}{0ex}}\left(2\right)1/2\phantom{\rule{0ex}{0ex}}\left(3\right)\infty \phantom{\rule{0ex}{0ex}}\left(4\right)-\infty $