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【单选题】
The efficient market hypothesis suggests that allocating your funds in the financial markets on the advice of a financial analystA.
will certainly mean higher returns than if you had made selections by throwing darts at the financial page.
B.
will always mean lower returns than if you had made selections by throwing darts at the financial page.
C.
is not likely to prove superior to a strategy of making selections by throwing darts at the financial page.
D.
is good for the economy.
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举一反三
【简答题】已知多项式f（x）=5x 5 +4x 4 +3x 3 +2x 2 +x+1，则f（2）=______．
【单选题】已知 f ( x - 1) = x 2 + 4 x - 5 ,则 f ( x ) 的表达式是 ( )
A.
f ( x ) ＝ x 2 ＋ 6 x
B.
f ( x ) ＝ x 2 ＋ 8 x ＋ 7
C.
f ( x ) ＝ x 2 ＋ 2 x － 3
D.
f ( x ) ＝ x 2 ＋ 6 x － 10
【单选题】已知函数f（x）=x 5 -5x 4 +10x 3 -10x 2 +5x-1，则f（x）的反函数为（ ）
A.
f -1 (x)= 5 x -1 (x∈R)
B.
f -1 （x）=（x-1） 5 -1（x∈R）
C.
f -1 (x)= 5 x +1 (x∈R)
D.
f -1 （x）=（x-2） 5 +1（x∈R）
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