Question

please help me solve the following questions​

Answer 1

Answer:

1. yes this is one- one function because all the elements is set A is mapped with elements of set B and every element of set A has only one image.

2. f(f(X) =

f(3x+2)

3(3x+2) +2

9x+6+2

9x+8.

3. domain of √25-x^2

25-x^2≥0

x^2≤25

x≤5

so domain is( -infinity ,5)

4. range of 1/2-cosx

we know that range of cosx = [-1,1)]

so minimum value of cosx = -1

so

1/2-(-1)

1/3

and we also know that maximum value of cosx = 1

so

1/2-(1)

= 1

so range is = [1/3,1]

please mark me braintlest