Derivative of the function f(x) = 7x^ -3 is: - Vidyadip

MCQ

Derivative of the function $f(x) = 7x^{-3}$ is:

A
$ 21 x^{-4}$
✓
$-21 x^{-4} $
C
$21 x^4 $
D
$ -21 x^4 $

✓

Answer

Correct option: B.

$-21 x^{-4} $

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from Limits and Derivatives→Limits and Derivatives — all question types→Maths STD 11 Science question papers→CBSE Board STD 11 Science question papers→CBSE Board question paper generator→

Similar questions

Rahul obtained $20$ and $25$ marks in first two tests. Find the minimum marks he should get in the third test to have an average of at least $30$ marks.

The number of $4$-digit integers in the closed interval [$2022, 4482$] formed by using the digits $0,2,3,4,6,7$ is. . . . .

Tangents to a circle at points $P$ and $Q$ on the circle intersect at a point $R$. If $P Q=6$ and $P R=5$, then the radius of the circle is

Find the ratio in which the $YZ-$plane divides the line segment formed by joining the points $(-2, 4, 7)$ and $(3, -5, 8):$

For $n \in N$, let $S _{ n }=\left\{ z \in C :| z -3+2 i |=\frac{ n }{4}\right\}$ and $T _{ n }=\left\{ z \in C :| z -2+3 i |=\frac{1}{ n }\right\}$ Then the number of elements in the set $\left\{ n \in N : S _{ a } \cap T _{ n }=\phi\right\}$ is.

The incentre of a triangle with vertices $(7, 1) \,(-1, 5)$ and $(3 + 2\sqrt 3 ,\,3 + 4\sqrt 3 )$ is

The four arithmetic means between $3$ and $23$ are

Sum of the series $1\cdot 2015 + 2\cdot 2014 + 3\cdot 2013 +.....2015\cdot 1$ is equal to :-

In a triangle $A B C$ with fixed base $B C$, the vertex $A$ moves such that $\cos B+\cos C=4 \sin ^2 \frac{A}{2} .$ If $a, b$ and $c$ denote the lengths of the sides of the triangle opposite to the angles $A, B$ and $C$, respectively, then

$(A)$ $b+c=4 a$

$(B)$ $b+c=2 a$

$(C)$ locus of point $A$ is an ellipse

$(D)$ locus of point $A$ is a pair of straight lines

If the three vertices of a rectangle taken in order are the points $(2, -2)$, $(8, 4)$ and $(5, 7)$. The coordinates of the fourth vertex is