If F(x) = x² - 3x + C and F (-1) = 4 , what is the value of C?

검증된 단계별 안내

Start with the given function F(x) = x² - 3x + C, where C is a constant to be determined.

Substitute x = -1 into the function F(x) since it is given that F(-1) = 4. This gives the equation: F(-1) = (-1)² - 3(-1) + C.

Simplify the terms in the equation: (-1)² = 1, -3(-1) = 3, so the equation becomes F(-1) = 1 + 3 + C.

Set F(-1) equal to 4 as given in the problem: 4 = 1 + 3 + C.

Solve for C by isolating it: Subtract 1 and 3 from both sides of the equation to find the value of C.

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주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Function Evaluation

Function evaluation involves substituting a specific input value into a function to determine its output. In this case, we need to evaluate the function F(x) at x = -1 to find the corresponding output, which is given as 4. This process is fundamental in calculus as it allows us to analyze the behavior of functions at specific points.

Algebraic Manipulation

Algebraic manipulation refers to the techniques used to rearrange and simplify algebraic expressions. To find the value of C in the equation F(-1) = 4, we will substitute -1 into the function F(x) and solve for C. Mastery of algebraic manipulation is essential for solving equations and understanding calculus concepts.

Constant Term in Functions

In the context of functions, a constant term is a fixed value that does not change with the input variable. In the function F(x) = x² - 3x + C, the term C represents a constant that shifts the graph of the function vertically. Understanding how constant terms affect function values is crucial for analyzing and interpreting functions in calculus.