Matematică
bos96
2015-11-18 12:41:00
raportul a doua numere este 1/4 si suma lor tot atat media aritmetica si cea geometrics a nr este?
Răspunsuri la întrebare
samw
2015-11-18 18:37:10

a/b=1/4 => b=4a a+b=1/4 a+4a=1/4 5a=1/4 => a=1/20 b=1/5 (1/20 + 1/5)/2=(1+4)/40=5/40=1/8 rad(1/20 • 1/5)=rad(1/100)=1/10

jgjdvfhnafdahs
2015-11-18 18:38:25

[latex] frac{x}{y} = frac{1}{4} = extgreater y=4x\\ x+y= frac{1}{4} extless = extgreater x+4x= frac{1}{4} = extgreater 5x= frac{1}{4} = extgreater x= frac{ frac{1}{4} }{5} \\ = extgreater x= frac{1}{4} * frac{1}{5} = extgreater x= frac{1}{20} \\ = extgreater y=4* frac{1}{20} = extgreater y= frac{4}{20} = extgreater y= frac{1}{5} [/latex] [latex]m_a= frac{ frac{1}{5} + frac{1}{20} }{2} \\ m_a= frac{ frac{4+1}{20} }{2} \\ m_a= frac{ frac{5}{20} }{2} \\ m_a= frac{ frac{1}{4} }{2} \\ m_a= frac{1}{4} * frac{1}{2} \\ m_a= frac{1}{8} [/latex] [latex]m_g= sqrt{ frac{1}{5} * frac{1}{20} } \\ m_g= sqrt{ frac{1}{100} } \\ m_g= frac{1}{10} [/latex]

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