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tonya8
@tonya8
July 2022
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дана арифметическая прогрессия: -6.2 ; -1.2 ; 3.8.найдите сумму первых пяти ее членов
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m11m
Verified answer
D=-1.2 - (-6.2)= -1.2+6.2=5
a₅=a₁+4d= -6.2+4*5= -6.2+20=13.8
Ответ: 19
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Verified answer
D=-1.2 - (-6.2)= -1.2+6.2=5a₅=a₁+4d= -6.2+4*5= -6.2+20=13.8
Ответ: 19