Question:

Let P12(x) be the real vector space of polynomials in the variable x with real coefficients and having degree at most 12, together with the zero polynomial. Define
\(𝑉 = \left\{𝑓 ∈ 𝑃_{12}(π‘₯): 𝑓(βˆ’π‘₯) = 𝑓(π‘₯) \text{for all}\ π‘₯ ∈ ℝ\ \text{and}\ 𝑓(2024) = 0\right\}.\)
Then, the dimension of V is _____________

Updated On: Jan 25, 2025
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Correct Answer: 6

Solution and Explanation

The space \( V \) consists of even polynomials (polynomials for which \( f(-x) = f(x) \)) of degree at most 12, and the condition \( f(2024) = 0 \) further restricts the possibilities. The even polynomials of degree at most 12 form a 6-dimensional subspace of \( P_{12}(x) \), as they are spanned by \( 1, x^2, x^4, x^6, x^8, x^{10} \). Thus, the dimension of \( V \) is 6.
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