Loading...
GRE
GRE Quantitative Reasoning Section

Minimum Value of a Quadratic Function

Very Hard Algebra Functions

Let the function $f(x)$ be defined by the equation:

$$ f(x) = 2x^2 - 4x + k $$

where $k$ is a constant. If the function has a minimum value at $x = 1$, what is the value of $k$?

Note: The minimum value of a quadratic function in the form $ax^2 + bx + c$ occurs at $x = -\frac{b}{2a}$.

Hint

Submitted11.3K
Correct8.4K
% Correct74%