Đáp án môn toán đại học khối a 2012

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Câu 1
b, m = 0
Câu 2
x = pi/2 + k.pi ; x = 2k.pi ; x = (2pi/3)+k2pi
Câu 3
x = 3/2, y = -0.5
Câu 4
i = 2/3 + ln3 - (2/3)ln2
Câu 5
V=(căn 7/12).a mũ 3
Khoảng cách = căn 48/8.a
Câu 7a
a(1,-1) a(4,5)
Câu 9a
-35/16
1341376098_DAP-AN.jpg
 

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