! "#$% &'( ) &*+, - Câu 1#%.* /0*1*)2&* 32 -4 56782717 &9 &&7-329 &: 09 -0) 0:7;7 3&: &% -&<) &')&% -9 &=) 2670: -()&<)&7-5&> *-*7')0) &% -9 &% &/2 &=) 2&7-32() 09 -+7 67?:> 30*0) 2& ')0) &% -9 & % &@-*%(=, *) 2&7-7 (-: -32() 09 -& 670*&: &% -&<) &')&% - 9 &% &&> *-*7?7,'%2= Câu 2#-:> *&7&7 9 &;9 *-9A '% //:>-3, 37 '7 B3+7 ,&<,- .% 2C D=*) 237,32 7;9 *-9A9 *&<)E &.% 2'7 B3=*) &&<, - ':> -<*)-32 7.% 2'7 F G = 7D ': 30% (3 1* 4&');9 *-9A= ?D ;9 *':> -<*)-32 7;9 *-9A, *&<)= 3D 29 ;9 *-9A3 ,7 &,7 &<,-.H2&7/7 *0E &9 &827 3% ');9 *-9A3, ;9 *':> - &% &'7 ?7,*)2I= Câu 3#,) &9 -: = *) & G J JAB h BC l α = = = = , 827 7 17 &5;9 *':> -37 3<, -<, 3+7 .%(&<4,=K7 3 0* & 19 m m ;*) 3%?E -= Câu 4#,7 30*) : G= *) &L MGLJL MNLJL G M@LJ L @ ML=*) &<> 32 7/4;) 5;, 7 O+7 37 3.%(9 *;9-07 -;) =*) &<> 32 7+9;)+932 -'> =K7 30* -*7 &<* 32 7L;*# 7D O, 7O> $9;) 3 @5$ +7 /4;) 3 B= ?D O, 7O0, -$9;) 3 @5$ +7 /4;) 3 A V L L L G L @ P Q G O $ "$ 6 ! Câu 1#C5B0*) D , *#827 -0:> -&: &% -&<) &0) &% -9 & v #$% &9 332 7&7-329 1,+> *&% -&<) &=$% (# s v t = C5B0*) D v #$% &9 332 7671,+> *&7-329 =$% (# s v t = C5B0*) D v #$% &9 332 7'71,+> *&% -&<) &= S v v v t = + = C5B0*) D = C D t tS S S t s t t t t t ⇔ + = ⇒ = = − C0*) D Câu 2#C0*) D 7D ) & 3/% 3 # $ M=M=C7 DM5B =C5B 5BDM5B= G C G D C5B0*) D 6: 30% (3 1* 4&#R M. . =$ M=5B= G MCD C5B0*) D ?D O*+% &9 *# - MR ⇔ . - =$MR G G BGGGC F D 5B= A g F d N m V ⇒ = = ; C5B0*) D G BGGG = BGG5GC F D g g g g d d D D kg m= ⇒ = = = C5B0*) D 3D O*.% 2+: 7-% /) &-9A# S S C D !C D g qc A qc A g d g P P F P F P V d d N+ = ⇒ = − = − ; C5TB0*) D Câu 3#C5B0*) D G AB h Sin BC l = = = C5B0*) D 9-0:7+% & ')37,# M = C5B0*) D 9-;4 ,+% & ')?E -E &/E - -*)-# MR=' C5B0*) D O*?, 827717 &# M = = P P h F l F⇔ = ⇒ = C5B0*) D 9 *+> *<, -<, 309 -> +% & # CD @ PF F⇒ = = C5B0*) D 9 *+> *<, -<, 309 -> +% & # CD P F⇒ = C5B0*) D : CD+7 CD# m m = C5B0*) D Câu 4#CG0*) D 7DO*;, 7O> #7 30*) '7 CL FFL D&L G 3 2 4 6 ( ) AB AD R R R R R R= + = + = Ω C5B0*) D *) 20*) &) -*: A 77*0% 29A*0,7 7 3# . 2 .4,8 1,6( ) 6 AD AB AD AB R U R U V R R = = = C5B0*) D *7 &<* 0*) &<> L# P r F r F r F r 2 1,6 1,6 16 ( ) 6 6.0,15 9 AD A U I R R R = = ⇒ = = Ω C5B0*) D ?DO*;, 7O0, -#7 30*) '7 #CL FFL D&CL G FFL @ D ) &<> &:>-0:>-32 79A*0,7 7 3# 1 2 1 2 . 3 .6 2 ( ) 3 6 AC R R R R R R R R R R = = = Ω + + C5B0*) D 3 4 3 4 . 4 .12 3 ( ) 4 12 CB R R R R R R R R R R = = = Ω + + C5B0*) D *) 20*) &) -*: A 77*0% 20,7 7 3 . 3 .4,8 7,2 ( ) 2 CB AC CB AC R U R U V R R = = = C5B0*) D :> -09 ., -0*) 827L +7 L @ # 2 2 4,8 (A) 6 V U I R R = = 4 4 7,2 ( ) 12 CB U I A R R = = C5B0*) D K4 &&7 *2 &# 2 4 4,8 7,2 2,4 6 12 12 A I I I R R R = − = − = 2,4 0,02 10( ) 12 R R ⇔ = ⇒ = Ω C5B0*) D . *<, -<, 3 09 -> +% & # CD @ PF F⇒ = = C5B0*) D 9 *+> *<, -<, 3 09 -> +%. &% -9 &% &/2 &=) 2&7-32() 09 -+7 67?:> 30*0) 2& ')0) &% -9