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- 2 3 4 5 6
- a * b = x1
- a * c = x2
- a * d = x3
- b * c = x4
- b * d = x5
- a = x1/b
- a = x2/c
- a = x3/d
- b = x4/c
- b = x5/d
- a = x1/x4*c
- a = x2/c
- a = x3/x5 * x4/c
- x2 = x3 * x4 / x5
- x1 / x4 * c^2 = x2
- x1/x4 * c^2 = x3/x5 * x4
- c^2 = x2 * x4 / x1
- c^2 = x3/x5 * x4 * x4 / x1
- x2 = x3 * x4 / x5
- x2 * x4 / x1 = x3/x5 * x4 * x4 / x1
- x2 = x3 / x5 * x4
- x2 * x5 = x3 * x4
- 2 * 6 = 3 * 4
- x2=2
- x5=6
- x3=3
- x4=4
- a * b = x1
- a * c = 2
- a * d = 3
- b * c = 4
- b * d = 6
- a * b = 5
- a * c = 2
- a * d = 3
- b * c = 4
- b * d = 6
- c * d = ?
- x1=5
- x2=2
- x5=6
- x3=3
- x4=4
- c = 4/b
- d = 6/b
- a * b = 5
- a * 4 / b = 2
- a * 6 / b = 3
- a * b = 5
- a * 4 = 2 * b
- a = 5/b
- 5/b * 4 = 2 * b
- 5 * 4 = 2 * b^2
- b^2 = 10
- b = sqrt(10)
- a = 5/sqrt(10)
- c = 4/sqrt(10)
- d = 6/sqrt(10)
- c * d = 6*4/10 = 2.4
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