Question

provide me with the following sets.....IR,Q,complex numbers?

Answer 1

Boldface R stands for real numbers, all numbers in the real line..
Q stands for Rational numbers, all numbers such that you can write them as a fraction a/b, where b is not 0
and Complex numbers are any numbers in the form a+bi where a and b are real numbers...i'm not sure if this is what you wanted...

Answer 2

for Q numbers u are correcct ......but i want a set not in words @mashe

Answer 3

In set notation? \[\mathbb{Q} = \left\{ x \left| x = a/b, a, b \epsilon \mathbb{Z}^+ or \mathbb{Z}^- \right| \right\}\]

Answer 4

\[Complex Number = {z:z=a+ib , a,b \in \mathbb{R}, i=\sqrt{-1}}\]

Answer 5

i not correct since division by zero is not allowed....u should have been stated that [b \neq 0\]..

Answer 6

@dominusscholae

Answer 7

Ahh yes, sorry about that. Overlooked it. Easier if I were writing this, but thanks for noting.

Answer 8

\[\mathbb R=(-\infty,\dots,\infty)\]

Answer 9

what if \[i \neq \sqrt{-1}\] ??@
vikrantg4

Answer 10

you need to specify what every symbol stands for in a set notation. thus if you specify that a and b are real numbers and i=sqrt(-1) in a+bi you are good to go...also check out
http://mathworld.wolfram.com/ComplexNumber.html