Posted by Alicia on Thursday, March 24, 2011 at 3:17pm.
I will translate and let you make the attempts:
a) ℚ is the set of rational numbers, which can be obtained as the quotient of two integers. This includes fractions, decimal numbers (repeating or not), and all integers.
So
(3/4) ∈ ℚ
is true or not?
b) ℝ is the set of real numbers,. It includes all rational numbers (ℚ), integers (ℤ) and all other numbers that are not complex, such as √(2), π, etc.
So
√(-1) ∈ ℝ
c) I do not know what I represents. The usual symbol for integers is ℤ, or ℕ for natural numbers, which are non-negative integers. If your book defines integers as I, the equivalent question would be:
0 ∈ ℤ
d) Natural numbers are non-negative integers.
I do not know what W stands for. Look carefully to see if it is not actually a fancy N, as in ℕ. So is the following statement true?
-2 ∈ ℕ
Related Questions
Math - I'm doing math through correspondence so material is not explained ...
grade 12 data management - Q- 2 cards are drawn without replacement from a deck ...
Math - Me and my grade 8 class are doing project on "data management"...
math-data management - I have just started grade 12 U Data Management, and i do ...
Evolutionary Bio - I was wondering if someone could explain to me how two ...
MTH 213-Elementary Math - (a) Illustrate a one-to-one correspondence between the...
Algebra 2 - Solve and Graph: ( i know that second part would be difficult but ...
Calculus - My teacher showed our class how to find the graph of a derivative ...
Math (Grade 12 Data Management) - A student is asked to make up a 6 digit number...
Math - Can someone please explain this problem to me? I would appreciate it very...
For Further Reading
