1.
Expand (
a
+ 2
b
)
4
.
A.
a
4
+ 8
a
3
b
+ 24
a
2
b
2
+ 4
ab
3
+
b
4
B.
a
4
+ 8
a
3
b
+ 24
a
2
b
2
+ 32
ab
3
+ 16
b
4
C.
a
4
+ 4
a
3
b
+ 12
a
2
b
2
+ 8
ab
3
+
b
4
D.
a
4
+ 8
a
3
b
+ 24
a
2
b
2
+ 8
ab
3
+
b
4
Hint
2.
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
3.
Simplify
.
A.
n
B.
C.
n
+ 1
D.
n
+ 1
Hint
4.
Evaluate
A.
126
B.
1
C.
504
D.
252
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