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Milashka0256
@Milashka0256
July 2022
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СРООЧНОО!!!!Дано:a(n) - арифметическая прогрессия
а(1)= -6
а(2)= -3
а(3)= 0
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miron2077
Verified answer
D=a₂-a₁=-3-(-6)=3
a₁₀=a₁+(10-1)d=-6+27=21
S₁₀=10*(a₁+a₁₀)/2=10*(-6+21)/2=(10*15)/2=75
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мохинсан
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Answers & Comments
Verified answer
D=a₂-a₁=-3-(-6)=3a₁₀=a₁+(10-1)d=-6+27=21
S₁₀=10*(a₁+a₁₀)/2=10*(-6+21)/2=(10*15)/2=75