
f(x)dz 1. Show that there exists ce 0,such that f(c) 30 sulc f(x)dz 1. Show that there exists ce 0,such that f(c) 30 sulc
Suppose that f is bounded on a, b and that for any cE (a, b), f is integrable on [c, b (a) Prove that for every e> 0, there exists CE (a, b) so that f(x)(c-a) < € for all x [a,b]. (b) For any > 0, find a partition P of [a, b so that U,P)-J f(r)dz < j and s f(r)dz L(f, P) < Hint: Do this by choosing c carefully and extending a partition of [c, b...
7. Let S = [0, 1] × [0, 1] and f : S → R be defined by f(x, y) = ( x + y, if x 2 ≤ y ≤ 2x 2 , 0, elsewhere. Show that f is integrable over S and calculate R S f(z)dz.
Let f(z) e-1/2.2 for xメ0, f(0) = 0. (a) Show that the derivative fk (0) exists for all k 21. So, f is Coo everywhere on R. b) Show that the Taylor series of f about p -0 converges everywhere on R but that it represents f only at the origin.
4. A common continuous probability distribution is the Gaussian (normal) distribution given by f(x)dx = ce-22/2a?dz - Suso. Find c, (x), (2), and o?.
(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...
Let f(x) = 2x4 +x4cos(1/x) for x ̸= 0 and f(0) = 0. Show that 0 is a global minimum x for f but for every neighbourhood V of 0 there exists x,y ∈ V such that f′(x) > 0 and f′(y) < 0.
= (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].
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].
show work
1) Find the limit if it exists. x? - 7x +10 x² + x-30 a) lim tan x b) lim c) lim tan x In x
Find the quantile function F^(-1)(p) (if one exists) of F(x) = {0 for x<= 0, (1/9)x^2 for 0<x<=3, 1 for x>3. For this, set the CDF equal to p and solve for x. This x is then F^(-1)(p).