

(3) Suppose that f E C'((0, 1]). Given e > 0, prove that there exists a polynomial p such that lf-plloo -p'|...
4. (a) Suppose that limz-c f(x) = L > 0. Prove that there exists a 8 >0 such that if 0 < 12 – c < 8, then f(x) > 0. (b) Use Part (a) and the Heine-Borel Theorem to prove that if is continuous on (a, b) and f(x) > 0 for all x € (a, b), then there exists an e > 0 such that f(x) > € for all x € [a, b].
3. (a) Suppose f : (a, b) + R is differentiable, and there exists M E R such that If'(x) < M for all x € (a, b). Prove that f is uniformly continuous on (a, b). (b) Let f : [0, 1] → [0, 1] be a continuous function. Prove that there exists a point pe [0, 1] with f(p) = p.
= (a) Suppose that limx+c f(x) L > 0. Prove that there exists a 8 >0 such that if 0 < \x – c < 8, then f(x) > 0. (b) Use Part (a) and the Heine-Borel Theorem to prove that if is continuous on [a, b] and f(x) > 0 for all x € [a,b], then there exists an e > 0 such that f(x) > e for all x E [a, b].
(a) Suppose that lim x→c f(x) = L > 0. Prove that there
exists a
δ > 0 such that if 0 < |x − c| < δ, then f(x) >
0.
(b) Use Part (a) and the Heine-Borel Theorem to prove that if
is
continuous on [a, b] and f(x) > 0 for all x ∈ [a, b], then
there
exists an " > 0 such that f(x) ≥ " for all x ∈ [a, b].
= (a) Suppose...
27. het f(x) be a polynomial function, with f(b) = 3, f(c) = 0, f(d) =1, and fle) -3, and becedce. which is true ? (3 pts) a) x-c is a factor of f(x) b) xtc is a factor of f(x) c) c is likely a touch point d) c is likely a cross point e) there exists n between c and a such that f(n) = 0 f) there exists p between aande such that f(p) = 0
with distinct nodes, prove there is at most one polynomial of
degree ≤ 2n + 1 that interpolates the data. Remember the
Fundamental Theorem of Algebra says a nonzero polynomial has number
of roots ≤ its degree. Also, Generalized Rolle’s Theorem says if r0
≤ r1 ≤ . . . ≤ rm are roots of g ∈ C m[r0, rm], then there exists ξ
∈ (r0, rm) such that g (m) (ξ) = 0.
1. (25 pts) Given the table...
2. Let f: R R be a continuous function. Suppose that f is differentiable on R\{0} and that there exists an L e R such that lim,of,(z) = L. Prove that f is differentiable at 1-0 with f,(0) = L. (Hint: Use the definition of derivative and then use mean value theorem)
2. Let f: R R be a continuous function. Suppose that f is differentiable on R\{0} and that there exists an L e R such that lim,of,(z) =...
Prove pc=p (the charpoly of C coincides with the polynomial
p)
0 ao 01 C: prove that pc p. Hint: To prove that the charpoly of C coincides with the polynomial p.
0 ao 01 C: prove that pc p. Hint: To prove that the charpoly of C coincides with the polynomial p.
] → [a, 시 be continuous. Prove that there exists c E [a,b (3) Let f : [a, such that f(c) = c i.e f has a fixed point
Prove or Disprove:
Let p E P(F) and suppose that deg p > 1 and p is irreducible. Then p(a)メ0 for all a E F.