Differentiation practice i - MadAsMaths
[Pages:71]Created by T. Madas
DIFFERENTIATION PRACTICE
Created by T. Madas
Created by T. Madas
THE OPERATION OF
DIFFERENTIATION
Created by T. Madas
Question 1 Evaluate the following.
( ) a) d 5x6 dx
Created by T. Madas
( ) d 5x6 = 30x5
dx
b)
d dx
2
x
3 2
d dx
2
x
3 2
=
3x
1 2
( ) c) d 6x4 - x3 dx
( ) d 6x4 - x3 = 24x3 - 3x2
dx
( ) d) d 3x2 + 5x +1 dx
( ) d 3x2 + 5x +1 = 6x + 5
dx
e)
d dx
4x
1 2
-
2x
-
7
d dx
1
4x2
-
2x
-
7
=
2
x
-
1 2
-
2
Created by T. Madas
Question 2 Evaluate the following.
( ) a) d 4x3 dx
Created by T. Madas
( ) d 4x3 = 12x2
dx
( ) b) d 7x5 dx
( ) d 7x5 = 35x4
dx
( ) c) d 4x2 + 3x4 dx
( ) d 4x2 + 3x4 = 8x +12x3
dx
( ) d) d x2 + 7x + 5 dx
( ) d x2 + 7x + 5 = 2x + 7
dx
e)
d dx
8
x
1 2
+
2 x -2
d dx
8x
1 2
+
2x-2
=
4
x-
1 2
-
4x-3
Created by T. Madas
Created by T. Madas
Question 3 Differentiate the following expressions with respect to x
a) y = x2 - 4x6
dy = 2x - 24x5 dx
b)
y
=
5x3
-
6x
3 2
dy
= 15x2
1
- 9x2
dx
c) y = 9x-3 + 7x-2
dy = -27x-4 -14x-3 dx
d) y = 5 - 5x-1
dy = 5x-2 dx
e) y = 7x + x
dy
=
7
+
1
x-
1 2
dx 2
Created by T. Madas
Created by T. Madas
Question 4 Differentiate the following expressions with respect to x
a) y = x6 - 7x2
dy = 6x5 -14x dx
5
b) y = 1- 6x 2
dy
3
= 15x 2
dx
c) y = 2x + 8x-2
dy = 2 +16x-3 dx
d) y = (2x -1)(4x + 3)
dy = 16x + 2 dx
e) y = 4x3 (2 - 3x)
dy = 24x2 - 48x3 dx
Created by T. Madas
Created by T. Madas
Question 5
Find f ( x) for each of the following functions.
a) f ( x) = 4x3 - 9x + 2
f ( x) = 12x2 - 9
b)
f
(
x)
=
6
x-
1 2
+
2x
f
(
x)
=
-3x-
3 2
+
2
c)
f
(x)
=
x4
+
5
2x2
f
(
x
)
=
4
x3
+
5
x
3 2
d)
f
(x)
=
1 2
x2
-
4x
-
3 2
e)
f
(x)
=
1 2
1
x3
+
5x
f
(
x)
=
x
+
6
x-
5 2
f
(
x)
=
1 6
x-
2 3
+
5
Created by T. Madas
Created by T. Madas
Question 6 Differentiate each of the following functions with respect to x .
a)
f
(x)
=
6x
-
3 2
+
4x
+ 1
f
(
x)
=
-9
x-
5 2
+
4
b) g ( x) = x4 - x-1
g( x) = 4x3 + x-2
c)
h
(
x
)
=
9x2
-
1 2
x
4
d)
p
(
x)
=
1
4x2
-
1
6x3
+
1 2
x-
1 4
( ) e)
v(x) =
8x
+
1 2
2
h( x) = 18x - 2x3
p(
x)
=
2x
-
1 2
-
2
x-
2 3
-
1 8
x-
5 4
v( x) = 128x + 8
Created by T. Madas
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