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#1 Re: Help Me ! » Functions » 2016-09-19 02:18:19

thickhead wrote:
baegelion wrote:

5. What is the maximum degree of a polynomial of the form

with
for 0 ≤ i ≤ n, 1 ≤ n, such that all the zeros are real?

Some clarification is required about

since
just the second degree expression has complex zero.

x^2 - x - 1 also fits the form and has two positive zeroes.

#3 Re: Help Me ! » Functions » 2016-09-14 04:10:48

4. Suppose we have the following identity:


Find the minimum of
over 0 ≤ p ≤ 1.

5. What is the maximum degree of a polynomial of the form

with
for 0 ≤ i ≤ n, 1 ≤ n, such that all the zeros are real?

6. Let f(m,1) = f(1,n) = 1 for m ≥ 1, n ≥ 1, and let f(m,n) = f(m-1,n) + f(m,n-1) + f(m-1,n-1) for m > 1 and n > 1. Also, let

, for a ≥ 1, b ≥ 1.
Note: The summation notation means to sum over all positive integers a,b such that a+b=k.
Given that
S(k+2) = pS(k+1) + qS(k) for all k ≥ 2,
for some constants p and q, find pq.

#4 Help Me ! » Functions » 2016-09-14 04:02:45

baegelion
Replies: 10

1. Let F(x) be the real-valued function defined for all real x except for x = 0 and x = 1 and satisfying the functional equation F(x) + F((x-1)/x) = 1+x. Find the F(x) satisfying these conditions.

Write F(x) as a rational function with expanded polynomials in the numerator and denominator.

2. Suppose that f(x) and g(x) are functions which satisfy f(g(x)) = x^2 and g(f(x)) = x^3 for all x ≥ 1. If g(16) = 16, then compute log_2 g(4). f(x) ≥ 1 and g(x) ≥ 1 for all x ≥ 1

3. The function

satisfies xf(x) + f(1 - x) = x^3 - x for all real x. Find f(x).

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