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T f v v λ = = B. v f T λ = = 1 C. v v.f T λ = = D. T v f λ = = 1 Câu 5: S )BA* YAZ8X)-!51π/!#6DTO['8 W\Q*<'8)'(]!F)^O);IT!*_ A. 51 B. Q1 C. .1 D. 01 Câu 6:`!**a8# ]['<BXW\!!H:*;@AO A. # T!*B. T!*C. bT!*D. # AIT!* Câu 7:S ]['<B!* <7G-c1!#I)GH!9I)7KDT!I8) () $DTId1eYAZD)M*!DT7G8['!**aDT.:*!7D<G;< f*JV!8)'(*8[';< A. 51#4 B. 01#4 C. d#4 D. .1#4 Câu 8:S !;K!;$& ()<!* !,0d1g4#D<!*h;] ;<105iG  !"*;<A. 11.# B. .##C. 1.# D. 5!# Câu 9:S #'@A;jk!*D$!) Z!NAD<,!NA;I;];<5511D$D<051D$SK! !) Z!NADT#=%&'!()551J3d1eW*%A%):HI)!) ,!NA+k ;<A. cdJ B. 0PJ C. 05J D. 5.J Câu 10:S DV ()$!Y8:!l&F)D98![OlDT 7D<!)Wm 8W\4.F)^;TN#<DV!*+]!O A. 7 Q  B. 7 5  C. 7 D. Q745 Câu 11:=# Z&!9# !;K!Z ()$DT!)WmW!()<!;K!h. ;IX!)Wm!;K!A. \#5;I B. h5;I C. h.;I D. WMn Câu 12:S !;K!;$&B#Do!*W;]#D<;$&W;]WMW+!* !,W  ()$YAZp,=Z!*!8Zq;<`DkD98![O;$& ^# = ∆l )Wm ()$!"!;K!<';< A.  5π ∆l  B. 0 # 5 Wπ  C. 5  ∆ π l D. 0 W 5 #π  Câu 13:8!!=;]r!8!$%&'!())['=;]<!*s89%) :_A. I*! B. )Wm C. I D. %A Câu 14:#=!%XDt  π = u1 ? /6 π = − . 01  /E68-Q1/Ω6  804Q3S^(0Q5 > G  8? 7 ) 7G -011 5 !011π/J6M)N8>;TNW>!*89 A..1/Ω6 Bd1/Ω6 C.Q1/Ω6 D.51/Ω6 Câu 15:8%#D(*8#rT!)BW@]A 0 D< 5 !!)01!#  !sADTIv-01e! 8)'(*8#rT!;<Q1!#48= 0  5 !*) !q!=_ A. P B. w C. d D. Q Câu 16:S *!Z!!*T!*U8)'(Y# pa+#S@+#gG@W\ !!Sg- ;%!A xϕ !" =+#SD<g;< A. ∆ϕ- π λ. d 2 B. ∆ϕ- π λ .d2 C. ∆ϕ- π λ .d D. ∆ϕ- π λ. d Câu 17: >M!"#'A%&'!();<# #![#!*Q!rA!q!aF)'DT! 0511 D$4AfI!")N% #'=8;<)_ A. v-Qu11e B. v-d1e C. v-.11e D. v-u1e Câu 18:S DVo ()$88:!l&YAZ8X&-7!/ωyϕ6JV!!"DV!* +),!;< A. D - z7  / z  y ϕ 6  B. D - L z7  / z  y ϕ 6  C. D - L 7 / z  y ϕ 6  D. 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B.-4c C.-4u D.-45 Câu 23:#=!%&'!()B#%8k>!) [')I!\#!*?-542D<# :%!*% )@#K!@AG@%AHI)#=!%;< 011 5 !011u t π = /J6+! $%8#=!!sADT%AHI)#=!%X%)!":%O A 01 3. 45/E6 B501 3. 42/E6 C01 3. 42/E6 D01 3. 452/E6 Câu 24:8D%!8)'(\%h&%AA<+\#!M)NA8['\ %_ A. ['!*%8k)N;T B. h!()<!"[' C. h%AkZ8)'( D. \#@%!"[' Câu 25:G  n]A!"5 ()$!sAZ!sIWMA:) !D< A.  ;%!A!" <AIB.  !" <AI,N C. I!)!" <AID.  !" <AI, Câu 26:}#=!!:W!)A8X;)MW!)D( A.  ! B.   C. !\ !D<  D. 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