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.
Simplify
.
A.
n
+ 1
B.
n
C.
n
+ 1
D.
Hint
3.
Evaluate
A.
252
B.
126
C.
504
D.
1
Hint
4.
Expand (4
x
+ 2
y
)
4
.
A.
B.
C.
D.
Hint
5.
Which of the following is not a pattern in the binomial expansion of (
a
+ b)
n
?
A.
There are
n
+ 1 terms.
B.
In successive terms, the exponent of
a
increases by one, and the exponent of b decreases by one.
C.
The sum of the exponents in each term is
n
D.
The coefficients are symmetric. They increase at the beginning of the expansion and decrease at the end.
Hint