... V.a : (1,0im) Gii phng trỡnh sau trờn s phc: z4 2z2 = B/ Chng trỡnh nõng cao: Cõu IV.b : (2,0im) 72 2010 http://www.mathvn.com 34 ễN THI TT NGHIP THPT 2010 WWW.MATHVN.COM Trong khụng gian ... sỏt s bin thi n v v th ca hm s ó cho b) Vit phng trỡnh tip tuyn ca (C), bit nú song song vi ng thng y = x + Cõu II (3 im) Cho hm s y = 72 2010 http://www.mathvn.com 32 ễN THI TT NGHIP THPT 2010 ... z, ta cú: z + z ' = z + z ' vaứ zz ' = z.z ' 72 I/ PHN DNH CHUNG CHO TT C CC TH SINH (7,0 im) 72 2010 http://www.mathvn.com 37 ễN THI TT NGHIP THPT 2010 WWW.MATHVN.COM Cõu I: (3,0im) 1) Kho...