rrr.rdns ogilpg -s.yJ.rt-E-ln rpHGr caNc noa xA HQr cHo nenh uFr NAit KHOA vAT LY Dgc tflp - rir co - Hqnh phrfid DErHr: gl4l rign ? toE r) lOp r_Y cO unAN I (zode - zlsozl Tho.i glan: 3C' ciu I (2.0 d) cho hdm s6 z = *2x+3v . Tim{lk" .azY? a?$luz t ( i ^b2006 for + q \ Cdu2{?=0d} s2 .A -vl t^ chb hdm s6 u = x.arctgy + y.arctgz + z.arctgx Tim ffUlilue # A-'3_Jt bi6t z(x,y) li ham An x6c dinh b&i:'xt * yt + 23 = 3xyz C' v*v! q t f cdu 3 (2.0 dl ,1 _ry_=. :,r:;, 1*i,* r (H): *_*=, 916 ciu 4 (2.0 d) Tim nghi€m cfia phuong trinh: x.y' + y = 2xzy.lny.y' th6a dieu ki€n dAu V({) = 1. Giu 5 (2.0 d) Cho phuong trinh vi ph0n: y" - 4y' + 5y = e'sinx (1) a. Tim nghiQm t6ng qudt cfia phuong trinh vi phAn thuAn nnAt tien f6t voi phucrng trinh (1). b. Tim nghi0m t6ng qu6t cria (1). Lde Ght chrri: Sinh vi6n kh6ng dugc sri'dgng tii liQu. U-4,1 tu!\ . ogilpg -s.yJ.rt-E-ln rpHGr caNc noa xA HQr cHo nenh uFr NAit KHOA vAT LY Dgc tflp - rir co - Hqnh phrfid DErHr: gl4l rign ? toE r) lOp r_Y cO unAN I (zode - zlsozl Tho.i. f cdu 3 (2.0 dl ,1 _ry_=. :,r:;, 1* i,* r (H): *_*=, 916 ciu 4 (2.0 d) Tim nghi€m cfia phuong trinh: x.y' + y = 2xzy.lny.y' th6a dieu ki€n dAu V({) = 1. Giu 5 (2.0. y" - 4y' + 5y = e'sinx (1) a. Tim nghiQm t6ng qudt cfia phuong trinh vi phAn thuAn nnAt tien f6t voi phucrng trinh (1) . b. Tim nghi0m t6ng qu6t cria (1) . Lde Ght