CLASS_11_MATHS_SOLUTIONS_NCERT

Class XI Chapter 13 – Limits and Derivatives Maths
______________________________________________________________________________
Question 7:
Find the derivative of the following functions (it is to be understood that a, b, c, d, p, q, r and s
are fixed non
1
zero constants and m and n are integers):
2
ax bx c
Solution 7:
1
Let f(x) =
2
ax bx c
By quotient rule,
2 d d 2
ax bx c 1 ax bx c
f ' x
dx dx
2
2
ax bx c
=
2
ax bx c02ax b
2
ax bx c
2ax
b
2
ax bx c
2
2
Question 8:
Find the derivative of the following functions (it is to be understood that a, b, c, d, p, q, r and s
are fixed non
ax b
zero constants and m and n are integers):
2
px qx r
Solution 8:
ax b
Let f(x) =
2
px qx r
By quotient rule,
f '
=
x
2 d
d 2
px qx r ax bax b px qx r
dx
dx
2
2
px qx r
2
px qx raax b2px q
2
px qx r
2
Printed from Vedantu.com. Register now to book a Free LIVE Online trial session with a
Top tutor.