... (x 1) log x B log x log log x 25 C log (x 1) 2log x 25 D log (x 1) log x 5 25 Cõu 16 : Tớnh o hm ca hm s y log 2 017 (x 1) 2x 2x A y ' B y ' C y ' D y ' x 2 017 (x 1) ln 2 017 (x 1) ... 48: Tỡm s phc cú phn thc bng 12 v mụ un bng 13 : A 12 i B 12 i C 12 5i D 12 i Cõu 49: Vi A(2;0; -1) , B (1; -2;3), C(0 ;1; 2).Phng trỡnh mt phng qua A,B,C l A.x+2y+z +1= 0 B.-2x+y+z-3=0 C.2x+y+z-3=0 ... M n mt phng (P) bng z t l A.M1(4, 1, 2) ; M2( 2, 3, 0) B.M1(4, 1, 2) ; M2( 2, -3, 0) C.M1(4, -1, 2) ; M2( 2, 3, 0) D.M1(4, -1, 2) ; M2( 2, 3, 0) m o c Cõu 31: Trong khụng gian vi h ta Oxyz,...