$15$

$3$ attempts left

$$

Find the limit$.$ Enter your answer as a fraction, do not use decimal approximations.

oints

$\underset{t0}{lim}\frac{1-\sqrt[\phantom{2}]{t^{2}1}}{12t^2}=$

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$16$

$3$ attempts left $$

Evaluate the limit$,$ if it exists.

$1$

points

$\underset{x\frac{}{2}}{lim}{x}^{2}cosx$

$$ A$.4$

B$.1$

C$.$ does not exist

$$ D$.0$

References$17$

$3$ attempts left

$$

Evaluate the limit$,$ if it exists.

$1$

points

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$$

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$\underset{x0}{lim}\frac{\sqrt[\phantom{2}]{x^{2}x25}-5}{x^{2}x}$

$$ A$.$ does not exist

B$.25$

C$.\frac{1}{10}$

D$.518$

$3$ attempts left

$$

$1$ points

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Evaluate $\underset{x2}{lim}f(x)$ where,

A$.$ does not exist

B$.8$

C$.10$

D$.619$

$3$

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$$

Find all discontinuities.

$1$

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$f(x)=\{\begin{array}{ccc}5x& if& x<mn>1</mn>\\ 7x^2& if& x1\end{array}$

A$.$ discontinuous at $x=-5,-7$

B$.$ discontinuous at $x=5,7$

C$.$ discontinuous for all $x$

D$.$ discontinuous at $x=1$