H am
da ne
M oh am
m ed
3 :ﺕﺎﺤﻔﺼﻟﺍ دﺪﻋ
ﺪﺣﻮﻤﻟﺍ ﻲﺒﻳﺮﺠﺘﻟﺍ ﻥﺎﺤﺘﻣﻻﺍ
ﻦﻳﻮﻜﺘﻟﺍ ﻭ ﺔﻴﺑﺮﺘﻠﻟ ﺔﻳﻮﻬﺠﻟﺍ ﺔﻴﻤﻳدﺎﻛﻷﺍ9 :ﻞﻣﺎﻌﻤﻟﺍ ﺎﻳﺭﻮﻟﺎﻜﺒﻟﺍ ﻚﻠﺳ ﺔﻴﻧﺎﺜﻟﺍ ﺔﻨﺴﻟﺍ ﻯﺮﺒﻜﻟﺍ ﺀﺎﻀﻴﺒﻟﺍ ﺭﺍﺪﻟﺍ ﺔﻬﺟ ﺕﺎﻋﺎﺳ 4: ﺯﺎﺠﻧﻹﺍ ﺓﺪﻣ -ﺄ- ﺔﻴﺿﺎﻳﺮﻟﺍ ﻡﻮﻠﻌﻟﺍ ﺔﺒﻌﺷ ﺮـــﺻﺍﻮﻨﻟﺍ ﺔـﺑﺎﻴﻧ
hamdane mo@hotmail.fr 2012 ﻱﺎــــﻣ ﺓﺭﻭد ﻱﺪﻴﺣﻮﺘﻟﺍ ﻥﺎﻴﺣ ﻲﺑﺃ ﺔﻳﻮﻧﺎﺛ
ﺔﺠﻣﺮﺒﻠﻟ ﺔﻠﺑﺎﻗ ﺮﻴﻐﻟﺍ ﺔﺒﺳﺎﺤﻟﺍ ﺔﻟﻵﺍ ﻝﺎﻤﻌﺘﺳﺎﺑ ﺢﻤﺴﻳ
ﻝﻭﻷﺍ ﻦﻳﺮﻤﺘﻟﺍ
x ⋆ y = 2xy
(1−x)(1−y) + 2xy :ﻊﻀﻧI = ]0; 1[ﻝﺎﺠﻤﻟﺍ ﻦﻣ yﻭ xﻞﻜﻟ (I
. I ﻲﻓ ﻲﻠﺧﺍد ﺐﻴﻛﺮﺗ ﻥﻮﻧﺎﻗ ⋆ ﻥﺃ ﻦﻴﺑ ❶ (0,25 pt)
.(I;⋆) ﻮﺤﻧR+∗; xﻦﻣ ﻲﻠﺑﺎﻘﺗ ﻞﻛﺎﺸﺗ ϕ(x) = x
2 +x :ﻖﻴﺒﻄﺘﻟﺍ ﻥﺃ ﻦﻴﺑ (ﺃ) ❷ (0.5 pt) .(I;⋆)ﻲﻓ ﺪﻳﺎﺤﻤﻟﺍ ﺮﺼﻨﻌﻟﺍ دﺪﺣ ﻢﺛ ﺔﻴﻟدﺎﺒﺗ ﺓﺮﻣﺯ(I;⋆) ﻥﺃ ﺞﺘﻨﺘﺳﺍ (ﺏ) (0,5 pt)
.(I;⋆) ﺓﺮﻣﺰﻠﻟ ﺔﻴﺋﺰﺟ ﺓﺮﻣﺯ
( 1
1 + 2x3m ;m∈Z
)
ﻥﺃ ﻦﻴﺑ ❸ (0,75 pt) .ﻲﻘﻴﻘﺣ ﻲﻬﺠﺘﻣ ﺀﺎﻀﻓ (M3(R); +;·)ﻥﺃ ﻭ ﺔﻳﺪﺣﺍﻭ ﺔﻘﻠﺣ (M3(R); +; x) ﻥﺃ ﺮﻛﺬﻧ(II
.I =
1 0 0 0 1 0 0 0 1
ﻭ B =
−√ 2 √
2 −2
0 0 0
−1 1 −√ 2
ﻭA =
1 √
2 −2 0 1 +√
2 0
−1 1 1
:ﻊﻀﻧ
. A2 = 2A+I :ﻥﺃ ﺖﺒﺛﺃ ﻢﺛ .B = A−1 +√
2I :ﻥﺃ ﻖﻘﺤﺗ ❶ (0,75 pt)
.(M3(R); +; x)ﺔﻘﻠﺤﻟﺍ ﻲﻓ ﺮﻔﺼﻠﻟ ﻢﺳﺎﻗ B ﻥﺃ ﻦﻴﺑ ❷ (0,75 pt)
ﻲﻧﺎﺜﻟﺍ ﻦﻳﺮﻤﺘﻟﺍ
.3 6 a 61953 ﺚﻴﺤﺑ 977 دﺪﻌﻠﻟ ﻒﻟﺎﺨﻣ ﻱدﺮﻓ ﻲﻌﻴﺒﻃ ﺢﻴﺤﺻ دﺪﻋa
.a976 ≡ 1[977]ﻥﺃ ﻦﻴﺑ ﻢﺛ ﻲﻟﻭﺃ دﺪﻋ977 ﻥﺃ ﻖﻘﺤﺗ ❶ (0,75 pt) .a976k ≡ 1[1954]ﺎﻨﻳﺪﻟkﻲﻌﻴﺒﻃ ﺢﻴﺤﺻ دﺪﻋ ﻞﻜﻟ ﻥﺃ ﺞﺘﻨﺘﺳﺍ ❷ (0,75 pt)
.(E) : a2x−(a−1)y = 1 :ﺔﻟدﺎﻌﻤﻟﺍ N2 ﻲﻓ ﺮﺒﺘﻌﻧ ❸
.(E)ﺔﻟدﺎﻌﻤﻟﺍN2 ﻲﻓ ﻞﺣ ﻢﺛ . (E)ﺔﻟدﺎﻌﻤﻠﻟ ﻞﺣ (1;a+ 1)ﺝﻭﺰﻟﺍ ﻥﺃ ﻖﻘﺤﺗ (ﺃ) (0,75 pt)
y ≡ 0[1954]:ﻥﺃ ﻦﻴﺑ . m≡ −2[976]ﺚﻴﺤﺑ (E)ﺔﻟدﺎﻌﻤﻠﻟ ﻞﺣ (am;y)ﻦﻜﻴﻟ (ﺏ) (0,75 pt)
.
Document trait´e par LATEX
3 ﻦﻣ 1 ﺔﺤﻔﺼﻟﺍ
.www.arabmaths.ift.fr
H am
da ne
M oh am
m ed
ﺚﻟﺎﺜﻟﺍ ﻦﻳﺮﻤﺘﻟﺍ
.(O;e# »1;e# »2) ﺮﺷﺎﺒﻣ ﻢﻈﻨﻤﻣ ﺪﻣﺎﻌﺘﻣ ﻢﻠﻌﻣ ﻰﻟﺇ ﺏﻮﺴﻨﻣ ﻱﺪﻘﻌﻟﺍ ﻯﻮﺘﺴﻤﻟﺍ
.(E) : z2−2 + 35iz + 1 +i = 0:ﺔﻟدﺎﻌﻤﻟﺍ Cﺔﻋﻮﻤﺠﻤﻟﺍ ﻲﻓ ﺮﺒﺘﻌﻧ: ﻝﻭﻷﺍ ﺀﺰﺠﻟﺍ
. (E)ﺔﻟدﺎﻌﻤﻟﺍ Cﺔﻋﻮﻤﺠﻤﻟﺍ ﻲﻓ ﻞﺣ ﻢﺛ(4−5i)2 ﻱﺪﻘﻌﻟﺍ دﺪﻌﻟﺍ ﻱﺮﺒﺠﻟﺍ ﻞﻜﺸﻟﺍ ﻰﻠﻋ ﺐﺘﻛﺃ ❶ (0,75 pt)
.tan(β) = 43 ﻭ tan(α) = 7 :ﺚﻴﺤﺑh0;π2h ﻝﺎﺠﻤﻟﺍ ﻦﻣ ﻥﺎﻴﻘﻴﻘﺣ ﻥﺍدﺪﻋβ ﻭ α ❷
.Arctg(7) + Arctg43= 3π4 : ﻥﺃ ﺞﺘﻨﺘﺳﺍ ﻭ ﻲﺜﻠﺜﻤﻟﺍ ﻞﻜﺸﻟﺍ ﻰﻠﻋ (E) ﺔﻟدﺎﻌﻤﻟﺍ ﻲﻠﺣ ﺐﺘﻛﺃ (0,75 pt) . aﺎﻬﻘﺤﻟ ﻱﺪﻘﻌﻟﺍ ﻯﻮﺘﺴﻤﻟﺍ ﻦﻣ ﺔﻄﻘﻧ Aﻭ ﻡﺪﻌﻨﻣ ﺮﻴﻏ ﻱﺪﻘﻋ دﺪﻋa : ﻲﻧﺎﺜﻟﺍ ﺀﺰﺠﻟﺍ
k ﻪﺘﺒﺴﻧ ﻭO ﻩﺰﻛﺮﻣ ﻱﺬﻟﺍ hﻲﻛﺎﺤﺘﻟﺍ ﻭ ، π2 ﻪﺘﻳﻭﺍﺯ ﻭ O ﻩﺰﻛﺮﻣ ﻱﺬﻟﺍ R ﻥﺍﺭﻭﺪﻟﺍ ﺮﺒﺘﻌﻧ .(k ∈R∗)
.P ﺔﻄﻘﻨﻟﺍ ﻖﺤﻟ pﻭ M ﺔﻄﻘﻨﻟﺍ ﻖﺤﻟmﻦﻜﻴﻟ ﻭ P =R(M)ﻭ M = h(A): ﻊﻀﻧ
.pﻭ mﻦﻴﻳﺪﻘﻌﻟﺍ ﻦﻳدﺪﻌﻟﺍ kﻭ a ﺔﻟﻻﺪﺑ دﺪﺣ ❶ (0,5 pt) دﺪﻌﻟﺍ ﺎﻬﻘﺤﻟ ﻲﺘﻟﺍ ﺔﻄﻘﻨﻟﺍ R ﻭ (AP) ﻢﻴﻘﺘﺴﻤﻟﺍ ﻰﻠﻋ O ﺔﻄﻘﻨﻠﻟ ﻱدﻮﻤﻌﻟﺍ ﻂﻘﺴﻤﻟﺍ H ﻦﻜﺘﻟ ❷
. m+iaﻱﺪﻘﻌﻟﺍ .ﺔﻴﻤﻴﻘﺘﺴﻣ Rﻭ H ﻭO ﻂﻘﻨﻟﺍ ﻥﺃ ﺞﺘﻨﺘﺳﺍ ﻭ ﺎﻓﺮﺻ ﺎﻴﻠﻴﺨﺗ p−a
m+ia ﻥﺃ ﻦﻴﺑ (ﺃ) (0,5 pt)
.AM Rﺚﻠﺜﻤﻟﺎﺑ ﺔﻃﺎﺤﻤﻟﺍ ﺓﺮﺋﺍﺪﻟﺍ ﻰﻟﺇ ﻲﻤﺘﻨﺗH ﺔﻄﻘﻨﻟﺍ ﻥﺃ ﻦﻴﺑ (ﺏ) (0.25 pt)
ﻊﺑﺍﺮﻟﺍ ﻦﻳﺮﻤﺘﻟﺍ
.g(x) = 2x+ 1−(x+ 1)ex :ﻲﻠﻳ ﺎﻤﺑ [0; +∞[ﻰﻠﻋ ﺔﻓﺮﻌﻤﻟﺍ g ﺔﻟﺍﺪﻟﺍ ﺮﺒﺘﻌﻧ : ﻝﻭﻷﺍ ﺀﺰﺠﻟﺍ .O; #»i; #»jﻢﻈﻨﻤﻣ ﺪﻣﺎﻌﺘﻣ ﻢﻠﻌﻣ ﻲﻓ ﺎﻫﺎﻨﺤﻨﻣ (Cg)ﻦﻜﻴﻟ ﻭ
.[0; +∞[ﻝﺎﺠﻤﻟﺍ ﻰﻠﻋ ﺎﻬﺗﺭﺎﺷﺇ ﺞﺘﻨﺘﺳﺍ ﻢﺛ g′(x)ﺕﺍﺮﻴﻐﺗ ﺱﺭدﺃ ❶ (0,75 pt)
.[0; +∞[ﻦﻣx ﻞﻜﻟg(x) 60 ﻥﺃ ﺞﺘﻨﺘﺳﺍ ﻭ g ﺔﻟﺍﺪﻟﺍ ﺕﺍﺮﻴﻐﺗ ﺱﺭدﺃ ❷ (0,75 pt)
.
f(x) = 1−e−x
xex ; x >0 f(0) = 1
:ﻲﻠﻳ ﺎﻤﺑ [0; +∞[ﻰﻠﻋ ﺔﻓﺮﻌﻤﻟﺍ f ﺔﻟﺍﺪﻟﺍ ﺮﺒﺘﻌﻧ: ﻲﻧﺎﺜﻟﺍ ﺀﺰﺠﻟﺍ .O;#»i;#»jﻢﻈﻨﻤﻣ ﺪﻣﺎﻌﺘﻣ ﻢﻠﻌﻣ ﻲﻓ ﺎﻫﺎﻨﺤﻨﻣ(Cf)ﻦﻜﻴﻟ ﻭ
.[0; +∞[ﻰﻠﻋ ﺔﻠﺼﺘﻣf ﻥﺃ ﻦﻴﺑ ❶ (0,5 pt) . f′(x) = g(x)
(xex)2 :ﻥﺃ ﻦﻴﺑ .]0; +∞[ﻦﻣx ﻦﻜﻴﻟ ❷ (0,25 pt)
. I(x) = Z 0
−x
(x+t)2
2 etdt :ﻊﻀﻧ[0; +∞[ﻦﻣ xﻞﻜﻟ ❸ .
Document trait´e par LATEX
3 ﻦﻣ 2 ﺔﺤﻔﺼﻟﺍ
.www.arabmaths.ift.fr
H am
da ne
M oh am
m ed
.0 6I(x)6 x
3
6 :ﺎﻨﻳﺪﻟ]0; +∞[ ﻦﻣx ﻞﻜﻟ ﻥﺃ ﻦﻴﺑ (ﺃ) (0,5 pt)
(∀x> 0) : I(x) = 1−x+ x2
2 −e−x : ﻥﺃ ﻦﻴﺑ ، ﻦﻴﺗﺮﻣ ﺀﺍﺰﺟﻷﺎﺑ ﺔﻠﻣﺎﻜﻣ ﻝﺎﻤﻌﺘﺳﺎﺑ (ﺏ) . (1) (∀x > 0) :−x2
2 61−x−e−x 6 x3 6 − x2
2 : ﻥﺃ ﻭ (0,75 pt)
.
h(x) = 1−e−x
x ; x > 0 h(0) = 1
:ﻲﻠﻳ ﺎﻤﺑ [0; +∞[ﻰﻠﻋ ﺔﻓﺮﻌﻤﻟﺍ h ﺔﻟﺍﺪﻟﺍ ﺮﺒﺘﻌﻧ ❹
((1)ﻞﻤﻌﺘﺳﺍ ) . 0ﻦﻴﻤﻳ ﻰﻠﻋ ﻕﺎﻘﺘﺷﻼﻟ ﺔﻠﺑﺎﻗ hﻥﺃ ﻦﻴﺑ (ﺃ) (0,25 pt) .(∀x >0) : f(x) = 2h(2x)−h(x) :ﻥﺃ ﻖﻘﺤﺗ (ﺏ) (0,25 pt)
.0 ﻦﻴﻤﻳ ﻰﻠﻋ ﻕﺎﻘﺘﺷﻼﻟ ﺔﻠﺑﺎﻗf ﻥﺃ ﺞﺘﻨﺘﺳﺍ (ﺝ) (0,25 pt)
.(Cf) ﻰﻨﺤﻨﻤﻟﺍO;#»i;#»jﻢﻠﻌﻤﻟﺍ ﻲﻓ ﺊﺸﻧﺃ ﻢﺛ f ﺔﻟﺍﺪﻟﺍ ﺕﺍﺮﻴﻐﺗ ﻝﻭﺪﺟ ﻂﻋﺃ ❺ (0,75 pt)
.(∀n∈ N) : un=
Z n
0 f(t) dt :ﻲﻠﻳ ﺎﻤﺑ ﺔﻓﺮﻌﻤﻟﺍ (un)ﺔﻳدﺪﻌﻟﺍ ﺔﻴﻟﺎﺘﺘﻤﻟﺍ ﺮﺒﺘﻌﻧ : ﺚﻟﺎﺜﻟﺍ ﺀﺰﺠﻟﺍ
.(∀x> 0) : 06 f(x) 6e−x :ﻥﺃ ﻦﻴﺑ ❶ (0,5 pt)
. (∀n∈ N) : 0 6un 61 :ﻥﺃ ﺞﺘﻨﺘﺳﺍ (ﺃ) ❷ (0,25 pt)
ﺔﺑﺭﺎﻘﺘﻣ ﺎﻬﻧﺃ ﺞﺘﻨﺘﺳﺍ ﻭ .ﺔﻳﺪﻳﺍﺰﺗ(un)ﺔﻴﻟﺎﺘﺘﻤﻟﺍ ﻥﺃ ﻦﻴﺑ (ﺏ) (0,5 pt)
. H(x) = Z x
0 h(t) dt :ﻲﻠﻳ ﺎﻤﺑ [0; +∞[ﻰﻠﻋ ﺔﻓﺮﻌﻤﻟﺍ H ﺔﻟﺍﺪﻟﺍ ﺮﺒﺘﻌﻧ ❸ .un = Z 2n
n h(t) dt ﻥﺃ ﻭ un = H(2n)−H(n) : ﺎﻨﻳﺪﻟ Nﻦﻣn ﻞﻜﻟ ﻥﺃ ﻦﻴﺑ (ﺃ) (0,75 pt) .(∀x >1) : 0 6 1
x −h(x)6 e−x :ﻥﺃ ﺖﺒﺛﺃ (ﺏ) (0,5 pt)
.n→lim+∞unﺐﺴﺣﺃ ﻢﺛ .(∀n∈N) : 06 ln(2)−un 6 e−n(1−e−n):ﻥﺃ ﺞﺘﻨﺘﺳﺍ ❹ (0,5 pt)
.
ψ(x) = 1 x
Z x
0 h(t) dt ; x >0 ψ(0) = 1
:ﻲﻠﻳ ﺎﻤﺑ R+ ﻰﻠﻋ ﺔﻓﺮﻌﻤﻟﺍ ψ ﺔﻟﺍﺪﻟﺍ ﺮﺒﺘﻌﻧ: ﻊﺑﺍﺮﻟﺍ ﺀﺰﺠﻟﺍ
.(∀x ∈]0; +∞[) : 1− x
4 6 ψ(x) 61− x 4 + x2
18 :ﻥﺃ ﻦﻴﺑ ❶ (0,5 pt)
.0 ﻦﻴﻤﻳ ﻰﻠﻋ ﻕﺎﻘﺘﺷﻼﻟ ﺔﻠﺑﺎﻗ ﻭ ،0ﻲﻓ ﺔﻠﺼﺘﻣ ψ ﻥﺃ ﺞﺘﻨﺘﺳﺍ ❷ (0,5 pt) .xlim
→+∞ψ(x)ﺞﺘﻨﺘﺳﺍ ﻭ .(∀x∈]1; +∞[) :
Z x
1 h(t) dt 6ln(x) :ﻥﺃ ﻦﻴﺑ ❸ (0,5 pt)
.(∀x∈]0; +∞[) : ψ′(x) = 1 x2
1−e−x−H(x) : ﻥﺃ ﻦﻴﺑ ❹ (0,5 pt)
.ψ ﺔﻟﺍﺪﻟﺍ ﺕﺍﺮﻴﻐﺗ ﻝﻭﺪﺟ ﻂﻋﺃ ﻢﺛ .(∀x∈ [0; +∞[) : H(x) >1−e−x : ﻥﺃ ﻦﻴﺑ ❺ (0,75 pt)
.
Document trait´e par LATEX
3 ﻦﻣ 3 ﺔﺤﻔﺼﻟﺍ
.www.arabmaths.ift.fr