SAT数学Problem Solving练习题(15)
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>>SAT考试:SAT数学Problem Solving练习题(15)
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Question 15: For any a≠1, (a4 - 1) / (a - 1) =
(a) a3 + a2 + a
(b) a3 + a2 + a + 1
(c) a2 + a + 1
(d) 1
(e) a + 1
Answer: A first inspection of the choices eliminates the c, d and e answers since the answer should be a polynomial with a degree of 4 - 1 = 3.
The correct answer is b.
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