Mathematics for IGCSE & O level - Functions (Section 1 - No. 24)
What is the range of the function g(x)= x^2 with the domain {-2, -1, 0, 1, 2}?
{-4, -1, 0, 1, 4}
{0, 1, 4}
{-2, -1, 0, 1, 2}
{4, 1, 0, 1, 4}
解释
Square each value in the domain. The output is {4, 1, 0, 1, 4}. Remove the duplicates. The range is {0, 1, 4}