Răspuns:
Explicație pas cu pas:
a)
a = 1 si 1/4 = (1·4+1)/4 = 5/4
b = 2/5
a·b = 5/4 ·2/5 = 10/20⁽¹⁰ = 1/2
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a = 7/8
a·b = 7/10 => b = 7/10 :a = 7/10 : 7/8 =>
b = 7/10 · 8/7 = 8/10⁽² = 4/5
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b = 1 si 1/2 = (1·2+1)/2 = 3/2
a·b = 5/6 => a = 5/6 : b = 5/6 : 3/2 =>
b = 5/6 ·2/3 = 10/18⁽² = 5/9
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b)
a = 1 si 1/4 = (1·4+1)/4 = 5/4
b = 2/5
a:b = 5/4 : 2/5 = 5/4 ·5/2 = 25/8
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a = 7/8
a:b = 7/10 => b = a:7/10 = a·10/7 = 7/8 ·10/7 = 10/8⁽² = 5/4
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b = 1 si 1/2 = (1·2+1)/2 = 3/2
a:b = 5/6 => a = 5/6 ·b = 5/6 ·3/2 = 15/12⁽³ = 5/4
