9-sinf matematika javoblar 2021

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$matematika 9-sinf 1lbilet 1. hisoblang:(1 5 - 2,2 + 1):22-= 12.2241). 218 m, 15 (m, 15 (e ee ): 5 11 \o5t ): tel he ): 5 i 14.1 5 m411 5 45 5 70 15 55 5 2 gs aa 3° 5 0 3 1 1 33 a3 98 shi 2. to*g‘ri to‘rtburchakning perimetri 32 ga, qo‘shni tomonlarining ayirmasi 2 ga teng. uning tomonlarini toping. v s ad=a, ab=b. p=2(a+b)=32, a+b=16 a-b=2 a+b=16_ |. che b { a—b=2 7 sistemani hosil gilamiz uni go’shib yuboramiz: 2a=18, a=9 o 9-b=2, b=7. a a 3. soddalashtiring: tg(-a)ctg(-a)+cos"(-a)+sin* a te(—a)ctg(—a) + cos*(—a) + zt?a = tga: (—ctge) + so5?a + zt?a = 1+ s05?a + zsh?a =1+1=2 5. teng yonli uchburchakning perimetri 66 sm. uning yon tomonini asosiga nisbati 4:3 ga teng a, uchburchakning tomonlarini toping. ab=bc=4x, ac=3x_ r=4x+3x+4x=66 sm 11x=66 sm x=6 “ № av=vs=4x=4*6=24 sm, ac=3x=3*6=18 et. = 2vpet : …$

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'un + vogim = veurg'un + 4 vogimga dagzm = veurgrun — vogim = verurgrun — 4 — “8 48 meuron 4 + meurgtun +4 5 veurg'un +4 veurg'un — 4 prurg!un® -16 48 t, go ee oe 96vrurg’un t 5(veurg'un™ ca 16) vturg'un? — 16 96’ tita’ ip ^ — 96vrurg'un — 80 = 0, ugri = 20 km/soat 3. agar tga+ctgo=a bo‘lsa, tg"a+ctg"a ni toping tga + ctga = a ning ikkala gismini kvadratga ko'taramiz: tg?a + 2tgactga + syod?a = a?, tg?a + 2 + ctg*a = a?, tg?a + syod?a = a? —2 5. to’v‘p burchakli trapetsiyaning asoslari 12 sm va 16 sm bo'lib, kama yon tomoni 5 sm ga teng. trapetsiyaning yuzini hisoblang. 8 woos vs = 12 5t, ab = 16sm, dc = 5sm, ae = vs = 12 sm, ed = 16-12 =45t 4 pifagor teoremasiga ko’ga se? = cd? — ed? = …

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matematika 9-sinf 1lbilet 1. hisoblang:(1 5 - 2,2 + 1):22-= 12.2241). 218 m, 15 (m, 15 (e ee ): 5 11 \o5t ): tel he ): 5 i 14.1 5 m411 5 45 5 70 15 55 5 2 gs aa 3° 5 0 3 1 1 33 a3 98 shi 2. to*g‘ri to‘rtburchakning perimetri 32 ga, qo‘shni tomonlarining ayirmasi 2 ga teng. uning tomonlarini toping. v s ad=a, ab=b. p=2(a+b)=32, a+b=16 a-b=2 a+b=16_ |. che b { a—b=2 7 sistemani hosil gilamiz uni go’shib yuboramiz: 2a=18, a=9 o 9-b=2, b=7. a a 3. soddalashtiring: tg(-a)ctg(-a)+cos"(-a)+sin* a te(—a)ctg(—a) + cos*(—a) + zt?a = tga: (—ctge) + so5?a + zt?a = 1+ s05?a + zsh?a =1+1=2 5. teng yonli uchburchakning perimetri …

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