IB Mathematics Analysis and Approaches Quiz
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NUMBER AND ALGEBRA
Question 1
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For what values of
x
x
x
is the binomial expansion of
(
9
−
3
x
)
−
1
/
2
(9-3x)^{-1/2}
(
9
−
3
x
)
−
1/2
valid?
A
∣
x
∣
<
1
/
3
|x| < 1/3
∣
x
∣
<
1/3
B
∣
x
∣
<
1
|x| < 1
∣
x
∣
<
1
C
∣
x
∣
<
3
|x| < 3
∣
x
∣
<
3
D
∣
x
∣
<
9
|x| < 9
∣
x
∣
<
9
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