Theorems Flashcards
(23 cards)
1
Q
1/1/a
A
a
2
Q
if ac = bc
A
then a = b , c≠0
3
Q
if ac = 0
A
then either a = 0 or c = 0
4
Q
1/ab
A
1/a ∙ 1/b
5
Q
b/1
A
b
6
Q
c/c
A
1, c≠0
7
Q
a/b ∙ c/d
A
ac/bd
8
Q
b/a
A
bc/ac , c≠0
9
Q
if b/a = d/a
A
then b = d
10
Q
if a/b = c/d
A
then ad = bc
11
Q
1/(b/a)
A
a/b
12
Q
(a/b)/(c/d)
A
ad/bc
13
Q
(-b)/a ; -b/-a
A
-(b/a) ; b/a
14
Q
a/b + c/d
A
(ad + bc) / bd
15
Q
-(-a)
A
a
16
Q
if a + c = b + c,
A
then a = b
17
Q
a ∙ 0
A
0
18
Q
( -a) ∙ b
A
-ab
19
Q
( -1) ∙ b
A
-b
20
Q
( -1) ∙ ( -1)
A
1
21
Q
( -a) ∙ ( -b)
A
ab
22
Q
-(a + b)
A
-a + -b
23
Q
-(a + b)
A
-a + -b
