9- sinflar uchun imtihon javoblari matematika
Download 0.74 Mb. Pdf ko'rish
|
1 2
Bog'liqтест матем
- Bu sahifa navigatsiya:
- Javob: 18 km/s
a
2 = b 2 + c 2 – 2*b*c*cos a Isbot: ABC ushburchakning BD balandligini o’tkazamiz. D nuqta AC tomonda yoki uning davomida bo’lishi mumkin. 1-hol. Tog’ri burchakli BCD uchburchakda Pifagor teoremasiga ko’ra DC=AC-AD bo’lgani uchun: BC 2 = BD 2 +(AC-AD) 2 = BD 2 +AC 2 - 2A*AD+AD 2 To’g’ri burchakli ABD uchburchakda BD 2 +AD 2 =AB 2 va AD=AB* cos a ekanini hisobga olib, oxirgi tenglikdan BC 2 =AB 2 +AC 2 -2AB*AC* cos a shu xulosaga kelamiz. h 5. A E C Yechish: AE=AB=4,5sm ; EC=5,5sm B D S=AB*(AE+EC)=4,5*(4,5+5,5)= 4,5*10=45 4-Bilet 1. -6 ( ) -6*(-200+198) =-24 2. V – turg’un suvdagi tezlik √ √ ( ) √ √ Javob: 18 km/s 3. Hisoblang. sin ( ) = 4. Uchburchakka ichki chizilgan aylanaga uchburchakning tomonlari urinma bo’ladi. Aylana radiuslari mos tomonlarga perpendikular bo’ladi. Ichki chizilgan S-? aylana markazi uchburchak burchaklarining bissektrissalari kesishish nuqtalarida joylashadi. Radiusni toppish formulasi : R= ; bu yerda ,,S” uchburchak yuzi, ,,p” esa yarim perimeteri. 5. A 14 B AK=BL=H; CK=LD= 5 5 Yechish; 1) H=√ √ C K 20 L D S= 5-Bilet 1. Hisoblang: √ =√ ( )( ) √( ) . 2. J: Kesishadi 3. =3 ifodaning sur’at va mxrajini cosx ga bo’lamiz. 2tgx-1=6+3tgx tgx=-7 4. Tekislikning berilgan O nuqtasidan berilgan R masofadan katta bo’lmagan masofada youtuvchi barcha nuqtalaridan tashkil topgan shaklga doira deb ataladi. Segment yuzi: Doira yuzi S= formuladan topiladi 5. Yechish: X x+15 2x=x+15 x=15 C=x+15=30 S-? 6-Bilet 1. √ √ √ √ √ √ =322 2. ( ) ( ) 3. ( ) =2 ) =2 4. Uchburchaklardan birining burchaklari ikkinchisining burchaklariga mos ravishda teng, mos tomonlari esa proporsional bo’lsa bunday uchburchaklar proporsional uchburchaklar deb ataladi. Agar bir uchburchakning ikkita burchagi ikkinchi uchburchakning ikki burchagiga mos ravishda ten bo’lsa bunday uchburchaklar o’xshash bo’ladi. Isbot. Uchburchak ichki burchaklari yig’indisi haqidagi teoremaga ko’ra, ( ) ( ) Demak, va uchburchaklarining burchaklari mos ravishda teng va ular o’xshash 5. S =a* a=9, b=6 P=2*(a+b)=2*(6+9)=2*15=30 7-Bilet 1. ( ) 2. | | 1) 6-3x-18<0 x>-4 2) 6-3x+18>0 x<8 x ( ) Tengsizlikning 11ta butun yechimi bor 3. 4. Pifagor formulasi : Isboti : kosinuslar teoremasi : Cos90 5. ( ) ( ) ( ) ( ) ( ) √ √ =5 8-Bilet 1. √ √ √ √ 2. -4 1.3x 9 x x>1 2+3=5 3. ( ) ( ) 4. ( ) Asoslari va balandligi bo’lgan ABCD trapetsiyasini qaraylik Trapetsiyada AC diagonalini o’tkazamiz. Bunda ABCD trapetsiya ABC va ACD uchburchaklarga ajraladi. Trapetsiya yuzi esa bu uchburchaklar yuzlari yig’indisiga teng bo’ladi. Parallel to’g’ri chiziqlar orasidagi masofa o’zgarmas bo’lgani uchun ABC va ACD uchburchaklarning balandliklari o’zaro teng. 5. h=8, a=12, R-? C C c √ √ R= a 9-Bilet 1. ( ) ( ) 2. 3. B BD=20, AB=25, BC=52, AD=63 A C D 4. Diogonallari kesishish nuqtasida teng ikkiga bo’linadi. Qarama qarshi tomonlari o’zaro parallel bo’lgan to’rtburchak parallelogram deb h ataladi. Parallelogrammning diagonalari kesishadi va kesishish nuqtasida teng 2ga bo’linadi. Isbot. ABCD – berilgan parallelogramm va 0-AC va BD diagonallarining kesishish nuqtasi bo’lsin. ekanini isbotlaymiz. Uchburchak tengligining 2-alomatiga ko’ra: chunki bu uchburchaklarda Shuning uchun, 5. R= √ ( )( )( ) =√ R= 10-Bilet 1. ( ) ( ) 2. x+ x<0 Max(x) =-1 3. [ ] √ ( ) √ √ ( ) 4. bo’ladi. 5. B C BC=10 AD=16 H= A D S= ( ) ( ) . 11-Bilet 1 .soddalashtiring: ( ( ) ) ( ) ( )( ) ( ) ( )( ) ( ) 2. | | 1) 2) 3. 26 Uchburchakda tomonlari 24;10;26 bo’ladi. 10 Bunda sina= Bundan sin2a= 2*sina*cosa=- 4. 5. a=7 b=8 c=10 bo’lsa, cosj-? Cosj= 12-Bilet 1. soddalashtiring: √ √ √ √ √ 2. y=| | 2 3. ( ) va cos(180-a) -? ( ) cos(180-a)=-cosa=-(-0,8)=0,8 4. h=5 asos=10√ S= √ 13-Bilet 1. Hisoblang: =1 2. d=5 2 3. ( ) =3-3tg 4. AK=6; BK=9 14=Bilet 1. ( ) ( )( ) ( ) √ 4. Uchburchakka tashqi chizilgan aylana radiusi : R= 5 . ( ) ( ) ( ) ( ) 15-Bilet 1. 3b32566 :9 b=2 2. 3. sin(a+b)=sin(180-j)=sinj 4. urinma aylana bilan o’zaro 1 ta umumiy nuqtaga , kesuvchi esa 2 ta nuqtaga ega bo’ladi. 5. 2x+3x+4x=54 9x=54 x=6 2x=12 3x=18 4x=24 16-Bilet 1. ( ) ( ) 2. q= S= ( ) 3. ( ) ( ) 4. Chakning tomoniga ikkinchi uchburchakning tomonlariga nisbati teng bo’lsa bu uchburchak- Lar o’xshash deyiladi. 5. A C Yechish: AE=3 BE=36 CE:DE=3:4 S 3x*4x=12 CE=9 DE=12 D B E 17-Bilet 1. 1,8x=54 x=30 2. 3. ( ) ( ) ( ) 4. a 5. ( ) ( ) r=1 18-Bilet 1. 25* 2. 3. ( ) ( ) ( ) 4. 5. A B 19-Bilet 1. a+3,2=3,6 a=0,4 2. ( ) x=13 X+8=21 [A.S. X>0] 3 A<0 4. ( ) h H b Skalyar ko’paytma; A( ) ( ) 5. AC=14 AB=28 BC=AC* √ √ √ √ A C B 20-Bilet 1. x=51 2x=102 6x=306 6x-x=5x=255 2. ( ) x 3. √ √ x 4. 5. a=2b=6 h=3 S= ( ) 21-Bilet 1. A* 2. 2x-3+6x=4x-2-12+3x x=-11 3. ( ) ( ) 4. 5. S= √ √ Cosinuslar teoremasidan c=3 √ √ √ 22-Bilet 1. S=120 T=S/( ) 2. ( ) ( ) S-? p=-8 q=7 3. . tg( ) √ 4. – 5. 2x=12 3x=18 √ √ √ 23-Bilet 1. a+a+2+a+4=81 3a=75 a=25 25;27;29 2. x=1 3. √ √ 4. ( ) 5. ( √ ) ( √ ) √ √ √ √ √ √ a=60 24-Bilet 1. 2*(a+2+a-1)-(a+1-a)=45 4a=44 a=11 2. ( ) — 3. 4. 5. 25-Bilet 1. 2. √ x=1 4. √ √ 5. a+b=45 1. √ 2. x=2 3. ( ) 4. 5. A B s=12 √ AC=2 √ C D 27-Bilet 1. ( )( ) ( )( ) ( ) 2x+5=3,1 x=1,55 3. ( ) 4. 5. x=4 P=5x=20. 28-Bilet 1. ( )( ) = 2. m=3*(-2+1)= 3 3. ( ) ( ) O 4. A C AO*OB=DO*OC D B 5. A L C B 1. ( ) ( ) ( ) ( )( ) 2. ( ) -12=4-2x x=8 3. sinα=-0,75 ( ) Sin(a-b)= ( ) √ * √ 4. Chi uchburchak tomonlariga nisbati mos ravishda teng bo’lsa, bunday uchburchaklar o’xshash uchburchaklar deyiladi. 5. ( ) y=5 3 3 30-Bilet 1. ( ) ( ) O O 2. ( ) ( ) x 3. 4. 5. √ 31-Bilet 1. √ √( )( ) ( ) √ 2. x=√ 3. 4. 5. x=10 3x=30 32-Bilet 1. ( ( ) ) ( ( ) ( ) ) ( )( ) ( )( ) ( )( ) √ √ 2. (1,7: (1 )): 1 1 X=0 3. ( ) 4. ( ) ( ) q-1=4 q=5 5. S a=7,5 b=5 P=2*(7,5+5)=2*12,5=25 sm 33-Bilet 1. x=1*5=5 kg 2. 2x-8+2x+4= Kvadrat tenglamani yechsak x=8;-2 javoblarni olamiz, lekin x=-2 bo’lganda x+2= 0 bo’lgani uchun , X=8 javobni olamiz. 3. ( √ √ √ ) (√ ) (√ √ √ ) √ 0,5*( √ ) √ =0,5 4. Chi uchburchak tomonlariga nisbati mos ravishda teng bo’lsa, bunday uchburchaklar o’xshash uchburchaklar deyiladi. 34-Bilet 1. 0,44x +14=x 0,56x=14 x=25 ta 2. x=2 y=1 z=0 X=1 y=2 z=0 3. ( ) ( )( ) 4. √ √ √ √ 5. 2S=168 35-Bilet 1. x=120 J:20 2. | | x-2 x 3. 2-30=-28 4. ( ) 1. 2. 3. ( ) ( ) ( ) ( ) ( ) 4. 5. C D AH= h HD=8 AD=10 h=6 H S= =48 37-Bilet 1. +y=1000 2x+2y=2000 2x+4y=3150 2y=1150 y=575 x=425 2. ( ) ( ) q=2 3. 4. 5. A B ( ) X 2 C D -60=0 X=5 X+5=12 S=a*b=5*12=60 38- Bilet 1. 2x=10 x=5 J:5;6;7 2.( √ √ √ √ √ √ √ ) (√ √ ) √ 3. ( ) ( ) 4 Pifagor teoremasi : 5. 13 X+7 y=6 x=9 39-Bilet 1. 10x=120 x=12 24;36;60 2. ( ) 3. (v+16)(1200+t)=v*t V=50 km/h 4.Uchburchak yuzi formulasi: S= 5. 7x-3x=12 x=3 21;9 40-Bilet 1. 2y=50 y=25 x=25 2. 15-12x<0 12x>15 x>1 3. √ √ √ √ √ √ √ 4. 5. A a a √ √ √ B 8 D 8 C R= √ √ 4 Download 0.74 Mb. Do'stlaringiz bilan baham: |
1 2
Ma'lumotlar bazasi mualliflik huquqi bilan himoyalangan ©fayllar.org 2024
ma'muriyatiga murojaat qiling
ma'muriyatiga murojaat qiling