THÔNG TIN TÀI LIỆU
! " x y x − = − " !"#$% &'()#*+,- &'.# / ! 0 !"#$% 1 2 3/ 4 x x x x π π + + = + + 05 !"#$%6 7 3 3 x x y x y x y x xy − + = − + = − !#899 :6,; 7 4 /< x x dx x π ∫ !$# %= >/?@='?@<#&A#B?C?@;(D< #:BE>/FD G#>?@>?H#BCD G#'#=24 4 / 89A#=#ID G#>?@>@/ !$#((<J!"#KLMM;/N#$.#6 3 a b b c c a ab c bc a ca b + + + + + ≥ + + + %& !"#$%&'()()*+, '" ()*+(, /012.((!3. !$"4 8$#D G#OPQR'+?-!S#G# ∆ 6RM3'M7;4/ 8%OP+@&P!S#G# ∆ !S#G#?@ ∆ T C&#= 7U 4 / !$"45#8$#)A##C5OPQR'V(+W-X- !S#G# 6 3 x y z d + = = − − 7 Y6 U x y z d − − = = N#6+W(J(JZH#.$PD G#/ !"#$%D G#=/ !$"4 0 !"#$%6 7 7 7 <# <# + + + + = x x x x x log x x x ()*+(, /012.( ./+4* !$"6 [+7 \]$+#5 8F^8[_ #5 8F^8 [_#5 $&#O `A#a\]$ _#5 8F^8 8$#D G#OPQR'!S#$b 6 C x y+ = (!S#G# 6 4d x y m+ + = /8% m + C c d B?@J59#?@Q<C d/ !$"6 8$#)A##C5OPQR'V(D G#6 ^6Re'MVM;4(f6Re'MVM3;4(g6RM'e3VM;4 !S#G# ∆ 6 − −x ; +y ; 3 z /0O ∆ <#&'^f/ !"#$%!S#G#J&A##=Cgc!S#G# ∆ ( ∆ / !$"6 0d !"#$%6<# R <# 3 h R e1 ≤ XXXXXXXXXXFXXXXXXXXXX [+7 \]$+#5 8F^8[_ #5 8F^8 [_#5 $&#O `A#a\]$ _#5 8F^8 $7'8 !9 :;<!./ ;=> / i8j R6 { } k D = ¡ i89 Y 4 y x D x − = < ∀ ∈ − F#$)# -−∞ - +∞ iF)A#=$ i0CB x Limy + → = +∞ x Limy − → = −∞ x Lim y →+∞ = x Lim y →−∞ = [=5jN#6R;(5j##'; i@# i 4/U 4/U 4/U 4/U / i8 &'B+ 4 4 - M x f x C∈ = !"#$% 4 4 4 Y y f x x x f x= − + F' 4 4 4 4x x y x x+ − − + − = i i#*+,- &'i.# 4 7 4 x x − ⇔ = + − #!T#5 4 4x = 4 x = i &'l%6 4x y+ − = U 4x y+ − = 4/U 4/U 4/U 4/U / i@` !"#$%L!"#!"#C 3 4 2 4 2 c x x c x π − + + + = U 3 4 3 2 c x c x π π ⇔ + + + + = U 4 2 2 c x c x π π ⇔ + + + + = 0!T 2 c x π + = − 2 c x π + = − <B i0 2 c x π + = − !T#5 x k π π = + U 2 x k π π = − + 4/U 4/U 4/U 4/U [+7 \]$+#5 8F^8[_ #5 8F^8 [_#5 $&#O `A#a\]$ _#5 8F^8 / i@`5!"#!"#C 3 3 x xy x y x y x xy − = − − − = − i[Dm n 3 x xy u x y v − = = (!T5 u v v u = − − = − i05$!T#5&-<-4X-X3 i8*=#!T#5R-'<-4X-4 4/U 4/U 4/U 4/U 3 i[D;R 89J;XRJR(`jR;4%;( 7 x π = % t = 8*= < <t t I dt dt t t = − = ∫ ∫ i[D < -u t dv dt t = = -du dt v t t ⇒ = = − >&'$ < < I t dt t t t = − + = − − ∫ io& < I = − − 4/U 4/U 4/U 4/U 7 i% i0OF<$&#+@(N# SH ABC⊥ i\p##=#ID G#>?@(>?CD'< 4 24SEH SFH= = iq HK SB⊥ (<j <&j&'$#=#ID G#>?@>@ .# HKA / irj <&j9!T?;?@;( a HA = ( 4 3 24 a SH HF= = i8#>F&A#BF= 3 4 KH a HK HS HB = + ⇒ = i8#?F&A#BF= 4 3 3 4 a AH AK H KH a = = = 3 3 AKH⇒ = 4/U 4/U 4/U 4/U [+7 \]$+#5 8F^8[_ #5 8F^8 [_#5 $&#O `A#a\]$ _#5 8F^8 U i@` a b c c ab c ab b a a b + − − = = + + − − − − i8*= c b a VT a b c a c b − − − = + + − − − − − − s((J!"#MM;((&P)#4-;tX(X(X J!"# i Jn#dG#NAJ!"#!T 3 3/ / / c b a VT a b c a c b − − − ≥ − − − − − − ;3 [G#NR'$)E) 3 a b c= = = 4/U 4/U 4/U 4/U 2/ i ∆ = !"#$% 3 x t y t = − = − + = 3-u = − ur i?&P ∆ 3 - A t t⇒ − − + i8=?@- ∆ ;7U 4 - c AB u⇔ = uuuur ur / / AB u AB u ⇔ = uuuur ur ur U 3 2h U2 7U 4 3 3 t t t t⇔ − − = ⇔ = ∨ = − i+l%< 3 7 3 - ( - 3 3 3 3 A A− − 4/U 4/U 4/U 4/U 1/ iJo& 4- -4M − = - - 3u = − − uur JZo& 4--7M = --Uu = uur i8= - 7- u-7u u O = − − ≠ uur uur ur ( 4--7M M = uuuuuuur \v - / 2 7 4u u M M = − + = uur uur uuuuuuur JJZ# G#/ i0O^<D G#NJJZ;t^= -- n = − ur o&W = !"#$% 4x y z+ − + = iswd'+W-X-&Px^(*== 4/U 4/U 4/U 4/U u/ i[_&)56Rt4 i8F6RvR;<#5 i8F6Rv x ≠ (` !"#$%!"#!"#C <# 7 <# 7 <# 7 x x x x x x + = + + + + + [D <# x x t+ = (!T !"#$% t t t + = + + #!T;;Xy3 4/U 4/U 4/U [+7 \]$+#5 8F^8[_ #5 8F^8 [_#5 $&#O `A#a\]$ _#5 8F^8 iC; <# x x⇒ + = !"#$%'A#5 iC;Xy3 <# 3 x x⇒ + = − 3 /7 x x⇔ + = i zjd' u x = <#5i z& u x > %8it z& u x < %8i{(j'i=#5J&'d u x = i<&j6#5 !"#$%L<R; u x = 4/U 2/ i=:Q4-4()9g; iJcB+ :5 - d O d⇔ < i8= / / / OAB S OAOB AOB AOB= = ≤ 8*=J59#?Q@<Cd)E) 4 h4AOB = - d I d⇔ = m ⇔ = ± 4/U 4/U 4/U 4/U 1/ i ∆ = !"#$% 3 x t y t z t = − = − + = i ∆ = !"#$% U 3 x s y s z s = + = + = i0| -d A d B∩ ∆ = ∩ ∆ = - -3 @M-UM3-A t t t⇒ − − + i -3 2- 3 AB s t s t s t= + − + − uuuur (xg= -- 3n = − ur i }d R AB n⊥ ⇔ uuuur ur H# !"# 3 2 3 3 s t s t s t+ − + − ⇔ = = − 3 7 t⇒ = iJo& 3 - - u A = -- 3n = − ur 4/U 4/U 4/U 4/U [+7 \]$+#5 8F^8[_ #5 8F^8 [_#5 $&#O `A#a\]$ _#5 8F^8 ;tJ= !"#$% 3 u 3 z x y − − − = = − u/ i[_&)56 3 4 <# h 1 4 h 1 4 x x x > − > − > #!T h <# 13x > % h <# 13x > t L!"#!"#C 3 <# h 1 x x− ≤ h 1 3 x x ⇔ − ≤ 3 u 3 h x x ≥ − ⇔ ≤ x ⇔ ≤ i<&jj #56 h <# 1-~T = 4/U 4/U 4/U 4/U [+7 \]$+#5 8F^8[_ #5 8F^8 [_#5 $&#O `A#a\]$ _#5 8F^8
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