{а5+а11=-0,2, {а4+а10=2,6.

Question

{а5+а11=-0,2,
{а4+а10=2,6.

Answer 1

Осылай шыгардым мен 9,7 2а1+12дһ2,6 денег жерге д-нын орнына -1,4 ти койганда шыгады

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Comments

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2 a1 + 12d = 2.6

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= 0+ 2d = -2.8

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2 d = -2.8

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d = -2.8 : 2 = -1.4

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2 a1 + 14d = -0.2

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2A1 = 14 x (-1.4) - (-2)

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2A1 =-19.4

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A1 = -19.4 : 2 = 9.7

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