If fix)= 20 VX, show that for any real number t zo f ( t x ) = Vit ( x ) Consider the function f (x)= 2x? -3. Calculate f(-1) , f(a-1 ), f(*), and f( vx). Find the domains of the following functions: a ) t (x) = x 2 - X + 2 b) f ( x ) = V X - 1 ( ) f ( x ) = 4x2