1.6. Знайдіть суму перших восьми членiв геометричної прогресії -1; 2; -4; ... . Created by anastasiawhy.

1.6. Знайдіть суму перших восьми членiв геометричної прогресії -1; 2; -4; ...

July 2023 1 4 Report

1.6. Знайдіть суму перших восьми членiв геометричної прогресії -1; 2; -4; ...

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Universalka

[tex]\displaystyle\bf\\b_{1} =-1\\\\b_{2} =2\\\\q=b_{2} : b_{1} =2:(-1)=-2\\\\\\S_{8} =\frac{b_{1} \cdot(q^{8}-1) }{q-1}=\frac{-1\cdot \Big[(-2)^{8}-1\Big] }{-2-1}=\frac{256-1}{3} = 85[/tex]

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anastasiawhy July 2023 | 0 Ответы

1 iv 644

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anastasiawhy July 2023 | 0 Ответы

50 c rewrite the sentences starting with the words given use the infinitive or ing form 1

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anastasiawhy July 2023 | 0 Ответы

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40 ch3 ch2 ch2 ch2 ch2 ch2 ch2 ch3 ch3 ch2 ch2 chch2 bch3 ch2 ch3 ch3 ch2 ch2 ch2 ch2 ch2 ch3

1 iv 644

50 c rewrite the sentences starting with the words given use the infinitive or ing form 1

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to visit peter this weekend would you like to come along

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100 5 1 15

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