t :, ,: ;,' Cf,u l;'alT"mhdnhthde Ir ll 1 1l I^-l l, v zl, I .,, , . , , . :: r ,. 1*. J' :1,, . lr,, ,, tl J .t l',,: : ' b) T4p M :{(*-,,+}h =q'}.0 li kh6ng gran vectdcon cfia IR? kfidng? ri - -: ceui- nmdnLxe ruydrtffi /: IR2 J .R' bg.t. f Q,\=(2,J2) , -f (r,r\=(o,z). _ +*, : I |'-' :''.'' ;'.:';*sff'::.' "*F-'9a.ag4qg=-+.;:i'-6 : **':'**ax@+*} @;::''.''; : \0 2) ,,,':r, ' a)'Ch6ohdamatr{n:z{.' ' ' ' ' , 'I '.' Ciur5. Dua vd d4ng chinh dc, dm 2 dd 4eng toiaphrldng sauxiic ttinh dtrong, - s4 +4+t4+4\\-24,4J2,rr.' ' - Hdt. K-r"L e *V ba" ou6 . l;'alT"mhdnhthde Ir ll 1 1l I^-l l, v zl, I .,, , . , , . :: r ,. 1* . J' :1, , . lr,, ,, tl J .t l',,: : ' b) T4p M :{( *-, ,+}h =q'}.0 li kh6ng. gran vectdcon cfia IR? kfidng? ri - -: ceui- nmdnLxe ruydrtffi /: IR2 J .R' bg.t. f Q,=(2,J2) , -f (r,r=(o,z). _ +*, : I |&apos ;-& apos; :''.'' ;'.:';*sff'::.'. vd d4ng chinh dc, dm 2 dd 4eng toiaphrldng sauxiic ttinh dtrong, - s4 +4+t4+4 -2 4,4J2,rr.' ' - Hdt. K-r"L e *V ba" ou6