One-to-One Functions...2

[nycmathguy]

Section 3.1
26 & 28

Question 26

2^(x - 2) = 64

Let 64 = 2^6.

2^(x - 2) = 2^6

x - 2 = 6

x = 6 + 2

x = 8

Question 28

5^(x - 2) = 1/125

Let 1/125 = 125^(-1).

Let 125 = 5^3.

5^(x - 2) = (5^3)^(-1)

5^(x - 2) = 5^(-3)

x - 2 = -3

x = -3 + 2

x = -1

You say?

 

[MathLover1]

perfect

 

[nycmathguy]

perfect

Thanks. What about the link below?
The title is wrong. It should be One-to-One Property...2.

Polynomial Function