Question

Podaj zbiór wartości funkcji f, jeśli:

a) f(x) = 1 D = {-4, -3, -2, -1, 0, 1, 2}

b) f(x) = 30-x D = {0, 5, 10, 15, 20}

c) f(x) = -x² D = {- √5, -√2, √2, √5}

d) f(x) = 1/x D = {-100; -32; -0,02; -√3/3; 2,125}

Answer 1

 

a) f(x) = 1          D = {-4, -3, -2, -1, 0, 1, 2}

Zbiór wartości  Z = {1}

 

b) f(x) = 30-x     D = {0, 5, 10, 15, 20}

Z = {30, 25, 20, 15, 10}

 

c) f(x) = -x²       D = {- √5, -√2, √2, √5}

Z = {-5, -2}

 

d) f(x) = 1/x      D = {-100; -32; -0,02; -√3/3; 2,125}

Z = {-1/100 ; -1/32; -50; -3/√3=-√3;  1/2,125=1000/2125=8/17}