Relations And Functions Flashcards
1
Q
4 types of intervals
A
Open
Closed
Open closed
Closed open
2
Q
What does the number b-a represent
A
It represents the length of the intervals as subset of R
3
Q
What is complements of (a,b) and [a,b]
A
4
Q
When is a2,b2 <- a,b applicable for x2
A
Only when in a real number line, a has lesser distance from the origin than b
5
Q
2 rules for x^2
A
When x<= a [a,b]
When x>=a (- ♾ ,-a] U [a, ♾)
6
Q
2 rules for 1/x
A
For 1/x belongs to [a,b]
If they are same sign, [1/b,1/a]
Elif they are opposite sign, ( - ♾, 1/a]U[1/b, ♾ )
7
Q
x<3 find values of x^2
A
(0,9)
