Question

găsiți valorile lui a,b,c dacă:a•b=45;b•c=18;c•b•a=90​

Answer 1

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Answer 2

a×b =45 ⇒ a=45÷b=$\frac{45}{b}$

b×c=18 ⇒b=18÷c=$\frac{18}{c}$

⇒$\frac{45}{\frac{18}{c} } =\frac{45c}{18} =\frac{15c}{6}$

c×b×a=90

c×$\frac{18}{c}$×$\frac{15c}{6} =90$

18×$\frac{15c}{6} =90$

45c=90

c=90÷45

c=2

b=$\frac{18}{2} =9$

a=$\frac{15 *2}{6} =5$