1.
What is the seventh term of (
x - y
)
8
?
A.
-35
xy
7
B.
-28
xy
7
C.
-8
xy
7
D.
8
xy
7
Hint
2.
Evaluate
A.
504
B.
126
C.
1
D.
252
Hint
3.
What is the sixth term in the expansion of (
t
+ 3
u
)
7
?
A.
63
t
5
u
2
B.
5103
t
2
u
5
C.
5103
t
5
u
2
D.
63
t
2
u
5
Hint
4.
Which of the following is not a pattern in the binomial expansion of (
a
+ b)
n
?
A.
The coefficients are symmetric. They increase at the beginning of the expansion and decrease at the end.
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.
There are
n
+ 1 terms.
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.
(
x
+
y
)
14
B.
(
x
+ 3
y
)
12
C.
(
x
+
y
)
13
D.
(2
x
+
y
)
11
Hint