b)

0,5x⁴ + 1 = 9

0,5x⁴ = 8

x⁴ = 16

x = 4

c)

(x - 1)³ + 1 = 9

(x - 1)³ = 8

x - 1 = ∛8

x - 1 = 2

x = 3

d)

[tex]\sqrt[3]{2x-4}[/tex] = 2

2x - 4 = 2³

2x - 4 = 8

2x = 12

x = 6

e)

[tex]\sqrt[4]{3x+4}[/tex] = 1

3x + 4 = 1⁴

3x = -3

x = -1

f)

(x+2)[tex]\frac{1}{3}[/tex] = 2

x+2 = 2³

x+2 = 8

x = 6