Question
Use the given function to complete parts (a) through (e) below. \( f(x)=x^{4}-36 x^{2} \) c) Hind the \( y \)-intercept by computing \( t(0) \). d) Determine the symmetry of the graph. Even; \( y \)-axis symmetry Odd; origin symmetry e) Determine the graph of the function. A.
Ask by Paul Chang. in the United States
Mar 06,2025
Upstudy AI Solution
Tutor-Verified Answer
Answer
- The \( y \)-intercept is \( 0 \).
- The function is even, so it has \( y \)-axis symmetry.
- The graph is a U-shaped curve symmetric about the \( y \)-axis.
Solution
Evaluate the expression by following steps:
- step0: Evaluate:
\(x^{4}-36x^{2}\)
- step1: Substitute:
\(0^{4}-36\times 0^{2}\)
- step2: Calculate:
\(0-36\times 0^{2}\)
- step3: Calculate:
\(0-36\times 0\)
- step4: Multiply:
\(0+0\)
- step5: Remove 0:
\(0\)
Determine whether the function \( f(x)=x^{4}-36 x^{2} \) is even or odd
Function by following steps:
- step0: Determine if even, odd or neither:
\(f\left(x\right)=x^{4}-36x^{2}\)
- step1: Use substitution:
\(f\left(-x\right)=\left(-x\right)^{4}-36\left(-x\right)^{2}\)
- step2: Simplify:
\(f\left(-x\right)=x^{4}-36x^{2}\)
- step3: Use substitution:
\(f\left(-x\right)=f\left(x\right)\)
- step4: The function is an even function:
\(\textrm{Even}\)
Let's go through the parts step by step:
### Part (c): Finding the \( y \)-intercept
To find the \( y \)-intercept of the function \( f(x) = x^{4} - 36x^{2} \), we compute \( f(0) \):
\[
f(0) = 0^{4} - 36 \cdot 0^{2} = 0
\]
Thus, the \( y \)-intercept is \( 0 \).
### Part (d): Determining the symmetry of the graph
To determine the symmetry of the function, we check if it is even, odd, or neither.
- A function is **even** if \( f(-x) = f(x) \).
- A function is **odd** if \( f(-x) = -f(x) \).
For the function \( f(x) = x^{4} - 36x^{2} \):
Since we found that \( f(x) \) is even, it has \( y \)-axis symmetry.
### Part (e): Determining the graph of the function
The function \( f(x) = x^{4} - 36x^{2} \) is a polynomial of degree 4, which typically has a U-shape. Given that it is even, the graph will be symmetric about the \( y \)-axis. The function has a minimum at \( x = 0 \) and opens upwards.
In summary:
- The \( y \)-intercept is \( 0 \).
- The function is even, indicating \( y \)-axis symmetry.
- The graph of the function is a U-shape, symmetric about the \( y \)-axis.
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Mind Expander
To find the \( y \)-intercept, you simply plug in \( x = 0 \) into the function: \[ f(0) = 0^{4} - 36 \cdot 0^{2} = 0 \] So, the \( y \)-intercept is at the point \( (0, 0) \). For symmetry, since \( f(-x) = (-x)^{4} - 36(-x)^{2} = x^{4} - 36x^{2} = f(x) \), it indicates that the function is even and thus symmetric about the \( y \)-axis.