(a) (4 marks) Consider the function S(x) = x-cos(x). 1) Prove that S has at least...
(1 point) Given the function f:1-5, 1] + [1,1]; f(x) = cos x, check which one(s) of the properties it has. A. strictly decreasing B. decreasing C. injective D. surjective E. strictly increasing F. increasing G. None of the above
ESTION 6 (8 marks) Consider the function f(x) = 2 2+1 .) Find the interval(s) in which the function f(x) is increasing and the interval(s) in which the function is decreasing. b) Find the interval(s) in which the function f(x) is concave up and the interval(s) in which the function is concave down. c) Sketch the graph of the function f(x) ABC T T Arial 3 (12pt) T
Consider the function on the interval (0, 2). f(x) = sin(x) cos(x) + 8 (a) Find the open interval(s) on which the function is increasing or decreasing. (Enter your answers using interval notation.) increasing decreasing (b) Apply the First Derivative Test to identify all relative extrema. relative maxima (x, y) = (smaller x-value) (larger x-value) (X,Y)= (x, y) = (1 (x, y) = relative minima (smaller x-value) (larger x-value)
2 (b) Prove that + 3 cos(atx) O has at least two solutions with x € (-1,1]. [20 Marks] 1 + x2 (c) State the Rolle's Theorem. [5 Marks] (d) Prove that + 3 cos(1x) = 0 has excalty one solution in [0, 1]. 1 + x2 [20 Marks (Hint:Use proof by contradiction, by supposing more than one root. ]
n=0 4. Using the power series cos(x) = { (-1)",2 (-0<x<0), to find a power (2n)! series for the function f(x) = sin(x) sin(3x) and its interval of convergence. 23 Find the power series representation for the function f(2) and its interval (3x - 2) of convergence. 5. +
Consider the following function. f(x) = cos(x) - sin(x), (0, 2) (a) Find the critical numbers of f, if any. (Enter your answers as a comma-separated list.) (b) Find the open intervals on which the function is increasing or decreasing (Enter your answers using interval notation. If an answer does not exist, enter DNE.) increasing х decreasing X (c) Apply the First Derivative Test to identify all relative extrema. (If an answer does not exist, enter DNE.) relative minimum (X,Y)...
PHYS1047 a) Given a random variable x, with a continuous probability distribution function fx) 4 marks b) The life expectancy (in days) of a mechanical system has a probability density write down equations for the cumulative distribution C(x) and the survival distribution Px). State a relationship between them. function f(x)=1/x, for x21, and f(x)=0 for x <1. i Find the probability that the system lasts between 0 and I day.2 marks i) Find the probability that the system lasts between...
1. Prove that for 0<x< , с 4C 1 1 Tx COS с Злх COS X= + + 5πχ COS с + 2 12 32 C 52
PROVE: 4. If f : R → R is a strictly increasing function, f(0) = 0, a > 0 and b > 0, then
1. Suppose that X is continuous random variable with PDF f(x) and CDF F(x). (a) Prove that if f(x) > 0 only on a single (possible infinite) interval of the real numbers then F(x) is a strictly increasing function of x over that interval. [Hint: Try proof by contradiction]. (b) Under the conditions described in part (a), find and identify the distribution of Y = F(x). 2. Suppose now that X ~ Uniform(0, 1). For each of the distributions listed...