Math Problem Statement
solve and prrove
Find, if possible, values of a, b, c, d such that the cubic curve y = ax^3 + bx^2 + cx + d passes through the points (1, 0), (2, 1), and (3, 2) in the xy-plane.
Solution
We are tasked with finding values of , , , and for the cubic equation such that it passes through the points , , and .
Let's solve this step by step.
Step 1: Substituting the points into the equation.
The cubic equation is:
Substituting the points , , and will give us a system of linear equations.
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For the point :
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For the point :
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For the point :
Now, we have the following system of equations:
1. & \quad a + b + c + d = 0 \\ 2. & \quad 8a + 4b + 2c + d = 1 \\ 3. & \quad 27a + 9b + 3c + d = 2 \end{align*}$$ ### Step 2: Solving the system. We will solve these equations to find $$a$$, $$b$$, $$c$$, and $$d$$.The general solution to the system of equations, with respect to $$d$$, is as follows: - $$a = -\frac{d}{6} - \frac{1}{6}$$ - $$b = d + 1$$ - $$c = -\frac{11d}{6} - \frac{5}{6}$$ Since $$d$$ is a free parameter, there are infinitely many solutions, depending on the value of $$d$$. This means the cubic curve can take different forms depending on the value assigned to $$d$$. Would you like further details on this, or do you have any specific questions? Here are some additional related questions to consider: 1. What would the curve look like if $$d = 0$$? 2. How does changing $$d$$ affect the shape of the cubic curve? 3. What happens if we include a fourth point to constrain the curve further? 4. How does this system demonstrate the flexibility of cubic functions? 5. Can this approach be extended to higher-degree polynomialsAsk a new question for Free
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Math Problem Analysis
Mathematical Concepts
Algebra
Cubic Equations
System of Linear Equations
Formulas
y = ax^3 + bx^2 + cx + d
Linear equations formed from substituting points (1,0), (2,1), (3,2)
Theorems
System of Linear Equations
Cubic Polynomial
Suitable Grade Level
Grades 10-12