Question

doar b vă rog e urgent ​

Answer 1

Răspuns:

x+y = 7√3 /4 = 1,75·√3

Explicație pas cu pas:

b) x = 1,25√3 -2,(3)√3 +0,6(1)√3

    y = -1,5√3+2,(3)√3-1,3(8)√3

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x = √3·(1,25-2,(3)+0,6(1)

y = √3·(-1,5+2,(3)-1,3(8)

x+y = √3·[1,25-1,5-2,(3)+2,(3)+0,6(1)-1,3(8)]

x+y = √3·[-0,25+0,6(1)-1,3(8)]

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-0,25 = -25/100 = -1/4

0,6(1) = (61-6)/90 = 55/90⁽⁵ = 11/18

1,3(8) = (138-13)/90 = 125/90⁽⁵ = 25/18

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x+y = √3·(-1/4 + 11/18 + 25/18)  =>

x+y = √3·(-1/4 + 36/18) =>

x+y = √3·(-1/4 + ⁴⁾2) =>

x+y = √3·(-1+8)/4 = √3·7/4 =>

x+y = 7√3 /4 = 1,75·√3