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Stage 5.1-2

11.01 The exponential function

Worksheet
Exponential equations
1

Solve the following exponential equations:

a

4^{x} = 4^{8}

b

3^{x} = 3^{\frac{2}{9}}

c

3^{x} = 27

d

7^{x} = 1

e

8^{x} = \dfrac{1}{8^{2}}

f

3^{y} = \dfrac{1}{27}

g

10^{x} = 0.01

h

3^{x} = 3^{6}

i

6^{x} = 6^{ - 3 }

j

6^{x} = 6^{\frac{4}{3}}

k

2^{x} = 64

l

9^{x} = 1

m

5^{x} = \dfrac{1}{5^{2}}

n

10^{x} = 0.0001

o

9^{y} = 81

2

Consider the following equations:

i

Rewrite each side of the equation with a base of 2.

ii

Hence, solve for x.

a

8^{x} = 4

b

16^{x} = \dfrac{1}{2}

c

\dfrac{1}{1024} = 4^x

3

Solve for x in the following equations:

a

9^{y} = 27

b

25^{y} = 125

c

3^{ 5 x - 10} = 1

d

25^{x + 1} = 125^{ 3 x - 4}

e

9^{x + 4} = 27^{x}

f

3^{ 4 x - 8} = 1

g

8^{x + 3} = 32^{ 2 x - 1}

h

3^{x^{2} - 3 x} = 81

i

27 \left(2^{x}\right) = 6^{x}

4

Solve for x in the following equations:

a

30 \times 2^{x - 6} = 15

b

2^{x} \times 2^{x + 3} = 32

c

3^{x} \times 9^{x - 1} = 27

d
3^{x} \times 3^{ 2 x} = 81
e

24 \times 2^{x - 6} = 12

f

2^{x} \times 2^{x + 2} = 16

g

3^{x} \times 9^{x - 4} = 9

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