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Basic Algebra

Denumerable and Induction

1. Show that if A and > are denumerable disjoint sets then A u > is denumerable 2. Show that every set of cardinalty c contains a denumerable subset 3. Show by induction that 6 divides n^3 - n for all n in N

Sum of consecutive odd integers

If m and n are odd integers with n>1, given the sum of n consecutive odd integers, starting with m, is 18,079. Find all possible values of m and n.

Lebesque measurable sets in R^n.

Prove that lebesque measurable sets in R^n form sigma algebra. ( Please use basic definition when you talk about the lebesgue measurable sets in R^n). The def we have is: (k_1)^(m)={ -1/2 + m_i =< x_i =< 1/2+ m} m=(m_1,m_2,...,m_n) m belongs to z^d Now we say that A in R^n is Lebesque measurable set in R^n if

Speed and Distance

Leon drove 270 miles to the lodge in the same time as Pat drove 330 miles to the lodge. If Pat drove 10 miles per hour faster than Leon, then how fast did each of them drive?

Distance and Speed

Janet drove 120 miles at x mph before 6:00 a.m. After 6:00 a.m., she increased her speed by 5 mph and drove 195 additional miles. Write a rational expression for her total traveling time. Evaluate the expression for x = 60.

Context-fee language

Thank you for taking the time to look at my problem. I cannot make math symbols, thus, I will let ^ denote "raised to the power." For example, a^2 is a squared or a "raised to the power" of 2. Also, I will use the symbol * to denote multiplication. For example, 2*7=14. Okay, here is my problem: Show that the language L={ a

Functions and Relations

A football player attempts a field goal by kicking the football. The ball follows the path modelled by the equation h=-4.9t2(means t squared)+10t+3, where h is the height of the ball above the ground in metres, and t is the time sincethe ball was kicked in seconds. 1. Describe the path of the ball. 2. After how many sec

Rounding to the nearest half inch.

When measuring a line with a ruler. When the question asks you to round to the nearest 1/2 inch, how do you determine if it is the nearest whole number or the nearest 1/2 number? Is the answer always a whole number?

The Division Theorem

Let p and a be positive integers and suppose that p|a2. a) Show that p|(ra + sp)2 for all integers r; s. b) Use part a), the definition of prime integer, and Theorem 15.1.1 to construct a proof by induction that p|a. [Hint: If a (< or =) p consider p = qa + r, where 0 (< or =) r < a. If p < a consider a = qp + r, where 0 (<

Solving Inequalities Using Interval Notation and Set-Builder Notation

4(3w+4)greater than or equal to 4(2w+12), it says to put answers in interval notation, that goes along with this one: 4-(3/2x-3)>1/2(x+5) I am not sure how to sove either one of these, they are somewhat the same except the second question asks for the answer in set builder notation.

Equations

The absolute value of 1/2n+2 is equal to the absolute value of 3/4n-2. How do I solve when there are fractions involved?

Change of Variables

Show that the change of variables.... Reduces 21.1 to the simpler and more familiar form from Ch. 18 Greenberg text, change of variables Please see the attached file for the fully formatted problems.