Предмет: Алгебра, автор: tikt92909

чому дориівнюе двадцять перший член арифметичної прогресії, якщо її перший член a1=2,2 , а різниця d=0,4? нужно срочно даю 15 балов​

Ответы

Автор ответа: Geh28b3veuwu
0

Ответ:

вот ......

....................

Приложения:
Автор ответа: ildar502020
1

Ответ:  10,2.

Объяснение:

a1=2.2;  d=0.4.  Найти a21.

---------------

an=a1+(n-1)d.

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a21 = 2.2+20*0.4 = 2.2+8=10,2.

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