Mathhh pl

1) which of the following function are one-to-one ? select all that apply.

a)f(x)=x-1/3x+3

b)f(x)=√5x+9

c)f(x)=7/4x^2

d)f(x)=1/2x^3

d)f(x)=3x^4+7x^3

2) find f^-1 for the function f(x)=∛x-2+8

a) f^-1(x)=(x-8)^3+2

b)f^-1(x)=(x+8)^3+2

c)f^-1(x)=∛x-8+2

d)f^-1(x)=(x-8)^3-2

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