Question

a) log (małe) ½ (2x+5)= 3

b) log (male) ⅕ x = -3

c) log(male) (x+1) 9 = 2

Answer 1

a)

2x + 5 = (1/2)^3

2x + 5 = 1/8

2x = 1/8 - 5

2x = -4 7/8

2x = -39/8

x = -39/8 * 1/2

x = -39 / 16

x = -2 i 7/16

 

b)

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

x = 5^3

x = 125

 

c)

9 = (x + 1)^2

3^2 = (x  +1)^2

3 = x + 1

x = 2