数学篇：SAT考试每日一题 11

>>SAT考试：数学篇：SAT考试每日一题 11

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Read the following SAT test question and then click on a button to select your answer.

(9+7i^18)/(4-i)

The complex expression above is equivalent to the expression a+bi for the rational constants a and b. What is the value of b?

(Note: i=√-1)

A.b=2/15

B.b=2/17

C.b=8/17

D.b=16/17

答案：B

解析：

Choice B is correct.

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