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一、选择题 :本大题共 1 2小题 ,每小题 5分 ,共 60分 .(1 ) 5(4+i) 2i(2 +i) =( ) .(A) 5(1 - 38i) (B) 5(1 +38i)(C) 1 +38i (D) 1 - 38i(2 )不等式 |2 x2 - 1 |≤ 1的解集为 ( ) .(A) { x|- 1≤ x≤ 1 }(B) { x|- 2≤ x≤ 2 }(C) { x|0≤ x≤ 2 }(D) { x|-
First, the multiple-choice questions: The title of a total of 12 small questions, each question 5 points, a total of 60 points. (1) 5 (4 + i) 2i (2 + i) = () . (A) 5 (1 - 38i) (B) 5(1 +38i)(C) 1 +38i (D) 1 - 38i(2) Inequality |2 x2 - 1 |≤ 1 The solution set is () .(A) { x|- 1 ≤ x ≤ 1 }(B) { x|- 2 ≤ x ≤ 2 }(C) { x|0 ≤ x ≤ 2 }(D) { x|-