The value of k for which the function
$f\left( x \right) = \left\{ {\matrix{
{{{\left( {{4 \over 5}} \right)}^{{{\tan \,4x} \over {\tan \,5x}}}}\,\,,} & {0 < x < {\pi \over 2}} \cr
{k + {2 \over 5}\,\,\,,} & {x = {\pi \over 2}} \cr
} } \right.$
is continuous at x = ${\pi \over 2},$ is :
Previous 10 Questions — JEE Main 2017 (9 April Morning Shift)
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The function $f$ defined by
$f(x) = x^{3} - 3x^{2} + 5x + 7$
is:
Topic: JEE Main 2017 (9 April Morning Shift)
If
$\displaystyle f\left(\frac{3x-4}{3x+4}\right) = x + 2,; x \ne -\frac{4}{3}$
and
$\displaystyle \int f(x),dx = A\ln|…
Topic: JEE Main 2017 (9 April Morning Shift)
A square, of each side $2$, lies above the $x$-axis and has one vertex at the origin.
If one of the sides passing throu…
Topic: JEE Main 2017 (9 April Morning Shift)
Let $f$ be a polynomial function such that
$f(3x) = f'(x)\cdot f''(x)$ for all $x \in \mathbb{R}$.
Then:
Topic: JEE Main 2017 (9 April Morning Shift)
A line drawn through the point $P(4,7)$ cuts the circle $x^{2} + y^{2} = 9$ at the points $A$ and $B$.
Then $PA \cdot P…
Topic: JEE Main 2017 (9 April Morning Shift)
If $2x = y^{\tfrac{1}{5}} + y^{-\tfrac{1}{5}}$ and
$(x^{2} - 1)\dfrac{d^{2}y}{dx^{2}} + \lambda x\dfrac{dy}{dx} + ky = …
Topic: JEE Main 2017 (9 April Morning Shift)
If
$\displaystyle \int_{1}^{2} \frac{dx}{(x^{2} - 2x + 4)^{\tfrac{3}{2}}} = \frac{k}{k+5}$,
then $k$ is equal to:
Topic: JEE Main 2017 (9 April Morning Shift)
The eccentricity of an ellipse having centre at the origin, axes along the coordinate axes, and passing through the poi…
Topic: JEE Main 2017 (9 April Morning Shift)
From a group of $10$ men and $5$ women, four-member committees are to be formed, each of which must contain at least on…
Topic: JEE Main 2017 (9 April Morning Shift)
If the vector $\vec{b} = 3\vec{j} + 4\vec{k}$ is written as the sum of a vector $\vec{b_1}$ parallel to
$\vec{a} = \vec…
Topic: JEE Main 2017 (9 April Morning Shift)
