Resposta:

4. Questão

a)

3³=3^x ==>x=3

b)

5³=5^x ==>x=3

c)

10^4=10^x ==>x=4

d)

32=(1/2)^x

2^5=2^(-x)

x=-5

e)

10^(-2) =10^x

x=-2

f)

2^(-1)=2^x

x=-1

g)

2^(3/2)=2^x

x=3/2

h)

(2/3)^3= (2/3)^x

x=3

i)

2^(-2)=2^x

x=-2

j)

7=7^x

x=1

k)

1=4^x

x=0

l)

(1/5)=(1/5)^x

x=1