1.
Use Pascal's Triangle to expand (
a - x
)
3
.
A.
a
3
- 3
a
2
x
+ 3
ax
2
-
x
3
B.
a
3
- 3
a
2
x
- 3
ax
2
-
x
3
C.
a
3
+ 3
a
2
x
- 3
ax
2
+
x
3
D.
a
3
+ 3
a
2
x
+ 3
ax
2
+
x
3
Hint
2.
Evaluate
A.
126
B.
504
C.
252
D.
1
Hint
3.
Expand (4
x
+ 2
y
)
4
.
A.
B.
C.
D.
Hint
4.
What is the sixth term in the expansion of (
t
+ 3
u
)
7
?
A.
63
t
5
u
2
B.
5103
t
5
u
2
C.
5103
t
2
u
5
D.
63
t
2
u
5
Hint
5.
Which of the following is an example of an expression whose seventh term in its binomial expansion is 1716
x
7
y
6
?
A.
(2
x
+
y
)
11
B.
(
x
+ 3
y
)
12
C.
(
x
+
y
)
13
D.
(
x
+
y
)
14
Hint