Al-Xorazmiyning tenglamani yechishdagi val-muqobala usulining mohiyati …

79. Tenglamalar sistemasini qanoatlantiruvchi sonlar juftligini aniqlang

A) (2; 3) B) (-2; 3) C) (3; 2) D) (-2; -3) E) (-3; 2)

80 . x ni toping: A) 2 B) C) D) 1 E) –1

81.(x; y) sonlar jufti sistemaning yechimi bo’lsa, y+x ni toping

A) 3 B) –3 C) 4 D) –1 E) 0

82. Koordinata tekisligida abssissasi musbat, ordinatasi manfiy bo’lgan nuqta qaysi chorakda yotadi?

A) I B) II C) III D) IV E) I va II

83. Funksiyaning berilish usullarini ko’rsating

1) tenglama 2) masala 3) formula 4) grafik 5) jadval

6) noma’lumlar orqali

A) 1, 2, 3 B) 2, 3, 4 C) 3, 4, 5 D) 4, 5, 6 E) 1, 5, 6

84. Ikki sonning o’rta arifmetigi 7 ga, kvadratlarining ayirmasi 14 ga teng. Shu ikki son kvadratlarining yig’indisini toping

A) 98,5 B) 56,25 C) 42,25 D) 96,5 E) 99,5

85. Uchta sonning nisbati 1:2:6 ga, ularning yig’indisi esa 459 ga teng. Shu sonlardan eng kattasining va eng kichigining ayirmasini toping

A) 245 B) 255 C) 235 D) 275 E) 265

86. Tenglamalar sistemasini yeching:

A) (1; -1) B) (0; 1) C) (0; 0) D) (1; 0) E) yechimga ega emas

87. Funksiya S= 60 ·t formula bilan berilgan. S (3,5)ni aniqlang

A) 210 B) 150 C) 24 D) 124 E) 250

88. y=2x+3 formula bilan berilgan funksiyada x ning –1 qiymatiga mos keluvchi y ning qiymatini toping