Дана формула последовательности an=-3n+2

1 вариант

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9th Grade
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20 questions
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1.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
a1=-1, d=5
a1=-1, d=-3
прогрессии нет
a1=-1, q=-3
2.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
an=(-1)n•n+1. Напишите члены прогрессии a1, a2, a3,a4 в порядке возрастания
a1, a2, a3,a4
a3, a1, a2, a4
a2, a3, a1, a4
a3, a1, a4, a2
3.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Если a1=7, d=4, найдите 5 первых членов арифметической прогрессии
7;11;18;25;32
7;14;21;28;35
7;10;14;18;22
7;11;15;19;23
4.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
a5=45, d=8. Найдите 8 член прогрессии
53
56
69
71
5.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Четвертый член геометрической прогрессии равен 12. Найдите произведение b3 и b5.
144
120
64
136
6.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Если tg=5, найдите значение выражения
7/13
7/15
-7/13
-7/15
7.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Из приехавших в город туристов 33 говорят на английском, 25 на французском, из них 11 говорят на двух языках, а 5 на немецком. Сколько всего туристов приехало в город?
85
52
63
91
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