Math Problem Statement
If f left parenthesis x right parenthesis equals 2 x cubed plus Ax squared plus 7 x minus 7 and f left parenthesis 2 right parenthesis equals 7, what is the value of A?
Solution
We are given the function:
And we know that:
Substitute into the function:
Simplify the expression:
We are told that , so:
Solve for :
Thus, the value of is .
Would you like more details or have any questions?
Here are 5 related questions:
- How do you solve cubic equations in general?
- What are other ways to find coefficients in a polynomial?
- How would you approach solving a system of equations involving multiple variables?
- What happens when a function’s value is undefined for a given ?
- How do the coefficients of a polynomial affect its graph?
Tip: When solving equations, always simplify expressions step by step to avoid errors.
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Math Problem Analysis
Mathematical Concepts
Algebra
Polynomial Functions
Substitution Method
Formulas
f(x) = ax^3 + bx^2 + cx + d
Substitution to find the value of a coefficient
Theorems
Basic properties of polynomials
Suitable Grade Level
Grades 9-11
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