Solving a mathematical quadratic function problem If it is known that the Square-1 of quadratic function y = 2x has the minimum value-1 in the interval [a, b], then the following relation must be true? A.0

Solving a mathematical quadratic function problem If it is known that the Square-1 of quadratic function y = 2x has the minimum value-1 in the interval [a, b], then the following relation must be true? A.0

Choose D
The minimum value of the function at x = 0 is - 1, and the minimum value on the interval [a, b] is - 1, so [a, b] must contain the point of x = 0, so we can choose D