1.
Order the steps for writing an indirect proof.
A.
1, 2, 3
B.
2, 1, 3
C.
2, 3, 1
D.
3, 2, 1
Hint
2.
State the assumption that could be used to start an indirect proof of the statement
If 2n < 6, then n < 3
.
A.
n
3
B.
n
< 3
C.
n
> 3
D.
n
= 3
Hint
3.
State the assumption that could be used to start an indirect proof of the statement
AB
+
BC
>
DE
.
A.
AB
+
BC
<
DE
B.
AB
+
BC
=
DE
C.
AB
+
BC
DE
D.
AB
+
BC
DE
Hint
4.
What is another name for an indirect proof?
A.
paragraph proof
B.
default proof
C.
proof by contradiction
D.
proof by assumption
Hint
5.
Which assumption would you make to start an indirect proof of the following statement?
The majority of students surveyed preferred chocolate ice cream to vanilla ice cream
.
A.
The number of students surveyed that preferred chocolate ice cream to vanilla ice cream was greater than 25%.
B.
The number of students surveyed that preferred vanilla ice cream to chocolate ice cream was greater than 50%.
C.
The number of students surveyed that preferred vanilla ice cream to chocolate ice cream was greater than 25%.
D.
The number of students surveyed that preferred chocolate ice cream to vanilla ice cream was greater than 50%.
Hint