To graph the equation y = − x 3 + 3 x , we use point-by-point plotting to obtain the graph in Figure. (A) Do you think this is the correct graph of the equation? Why or why not? (B) Add points on the graph for x = − 2 , − 1.5 , − 0.5 , 0.5 , 1.5 , and 2 (C) Now, what do you think the graph looks like? Sketch your version of the graph, adding more points as necessary. (D) Graph this equation on a graphing calculator and compare it with your graph from part (C).
To graph the equation y = − x 3 + 3 x , we use point-by-point plotting to obtain the graph in Figure. (A) Do you think this is the correct graph of the equation? Why or why not? (B) Add points on the graph for x = − 2 , − 1.5 , − 0.5 , 0.5 , 1.5 , and 2 (C) Now, what do you think the graph looks like? Sketch your version of the graph, adding more points as necessary. (D) Graph this equation on a graphing calculator and compare it with your graph from part (C).
Let g(z) =
z-i
z+i'
(a) Evaluate g(i) and g(1).
(b) Evaluate the limits
lim g(z), and lim g(z).
2-12
(c) Find the image of the real axis under g.
(d) Find the image of the upper half plane {z: Iz > 0} under the function g.
k
(i) Evaluate
k=7
k=0
[Hint: geometric series + De Moivre]
(ii) Find an upper bound for the expression
1
+2x+2
where z lies on the circle || z|| = R with R > 10. [Hint: Use Cauchy-Schwarz]
4.
5.
6.
Prove that p (gp) is a tautology using the laws of propositional logic.
Prove that p((pVq) → q) is a tautology using the laws of propositional logic.
Let us say a natural number n is ok if there are two natural numbers whose sum
is n and whose product is n. (Convention: the natural numbers consist of 0, 1, 2,...)
(a) Give a logical expression that means "n is ok".
(b) Show that 0 and 4 are both ok.
(c) Give a logical expression that means "every natural number is ok".
(d) Give a logical expression that means "it is not the case that every number is ok". Push
the negations into the expression as far as possible.
Chapter 2 Solutions
Finite Mathematics for Business, Economics, Life Sciences and Social Sciences
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, subject and related others by exploring similar questions and additional content below.
RELATIONS-DOMAIN, RANGE AND CO-DOMAIN (RELATIONS AND FUNCTIONS CBSE/ ISC MATHS); Author: Neha Agrawal Mathematically Inclined;https://www.youtube.com/watch?v=u4IQh46VoU4;License: Standard YouTube License, CC-BY