Iii kurslarga

76. o’tkir burchakli uchburchakda va balandliklar o’tkazilgan. Agar va uchburchaklarning yuzalari mos ravishda 18 va 2 ga teng bo’lsa, uchburchakka tashqi

chizilgan aylana radiusini toping. ____________________________________

77. 
    To’g’ri burchakli uchburchakning tomonlari o’suvchi geometrik progressiyani tashkil etsa, progressiyani maxrajini toping.
    
78. 
    Ketma-ketlikning umumiy hadining formulasi bo’lsa, uning hadlarining sonini toping _______________________________
    

77. 
    Agar , qiymatini toping ____________
    
78. 
    tenglama a ning qaysi qiymatlarida ikkita ildizga ega? _______________
    

1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20
A	D	C	C	B	C	D	D	A	B	A	B	A	C	D	A	B	D	A	C
21	22	23	24	25	26	27	28	29	30	31	32	33	34	35	36	37	38	39	40
A	D	C	B	B	A	A	A	A		A	A	C	B	C	A	D	D	A	A
41	42	43	44	45	46	47	48	49	50	51	52	53	54	55	56	57	58	59	60
D	B	A	C	C	A	D	C	B	B	B	A	B	B	A	C	C	B	B	D

61/ 62. 63/ 322 64. 65/

66/ 4 67. 1 68. 69.

70. 71. 2 72. -2,6 73. 7 74. 30^O

75. 76. 9/2 77. 78. 25

79. 80.