JEE MATHEMATICS MCQ: LIMITS

1 Easy

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Application +4 | -1

Let

f(x)=x^2-1,0 < x < 2

and

2 x+3,2 \leq x < 3

. The quadratic equation whose roots are

\lim \limits_{{x \rightarrow 2-0}} f(x)

and

\lim \limits_{{x \rightarrow 2+0}} f(x)

, is

View answer and explanation

Correct option: B

x^2-10 x+21=0

Option B (

x^2-10x+21=0

) is correct because the roots of the quadratic equation are the left-hand limit and right-hand limit of the function at x=2, which are 3 and 7 respectively.

More Questions from LIMITS

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\lim \limits_{{x \rightarrow 0}}\left(\frac{1}{x^2}-\operatorname{cosec}^2 x\right)

is equal to

\lim _{x \rightarrow \frac{\pi}{2}} \frac{\cos x}{(1-\sin x)^{2 / 3}}=

The value of

\lim\limits_{h \to 0} 2\left\{ {\frac{{\sqrt 3 \sin \left( {\frac{\pi }{6} + h} \right) - \cos \left( {\frac{\pi }{6} + h} \right)}}{{\sqrt 3 h\left( {\sqrt 3 \cos \,h - \sin \,h} \right)}}} \right\}

\lim \limits_{{x \rightarrow \infty}} x\left(e^{1 / x}-1\right)

is equal to If

f(x)=\frac{(x+1)^7 \sqrt{1+x^2}}{\left(x^2-x+1\right)^6}

, then the value of

f^{\prime}(0)

is equal to

\lim\limits_{n \to \infty } {\left( {1 + \sin \frac{a}{n}} \right)^n}

equals