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K cho mik nhé Gumm
\(-\frac{9}{5}=\frac{-54}{30},\frac{11}{-6}=-\frac{55}{30}\)
\(-\frac{54}{30}>-\frac{55}{30}\Rightarrow-\frac{9}{5}>-\frac{11}{6}\)
\(-\frac{6}{11}=-\frac{30}{55}\)
\(\frac{42}{-37}va\frac{-56}{43}\)
\(\frac{42}{-37}=\frac{-42}{37}=\frac{-1806}{1591}\)
\(\frac{-56}{37}=\frac{-2408}{1591}\)
Vì\(\frac{-1806}{1591}>\frac{-2408}{1591}\)
=>\(\frac{42}{-37}>\frac{-56}{43}\)
\(\frac{217}{18}va\frac{217}{19}\)
Vì\(\frac{217}{18}>\frac{217}{19}\)
=>\(\frac{217}{18}>\frac{217}{19}\)
\(\frac{-9}{14}va\frac{19}{-25}\)
\(\frac{-9}{14}=\frac{-225}{350};\frac{19}{-25}=\frac{-19}{25}=\frac{-266}{350}\)
Vì\(\frac{-225}{350}>\frac{-266}{350}\)
=>\(\frac{-9}{14}>\frac{19}{-25}\)
Chúc bạn học tốt!
\(\frac{x-1}{59}+\frac{x-2}{58}+\frac{x-3}{57}=\frac{x-4}{56}+\frac{x-5}{55}+\frac{x-6}{54}\)
<=>\(\frac{x-1}{59}+\frac{x-2}{58}+\frac{x-3}{57}-\frac{x-4}{56}-\frac{x-5}{55}-\frac{x-6}{54}=0\)
<=>\(\frac{x-1}{59}-1+\frac{x-2}{58}-1+\frac{x-3}{57}-1-\frac{x-4}{56}+1-\frac{x-5}{55}+1-\frac{x-6}{54}+1=0\)
<=>\(\frac{x-60}{59}+\frac{x-60}{58}+\frac{x-60}{57}-\frac{x-60}{56}-\frac{x-60}{55}-\frac{x-60}{54}=0\)
<=>\(\left(x-60\right)\left(\frac{1}{59}+\frac{1}{58}+\frac{1}{57}-\frac{1}{56}-\frac{1}{55}-\frac{1}{54}\right)=0\)
Do \(\frac{1}{59}+\frac{1}{58}+\frac{1}{57}-\frac{1}{56}-\frac{1}{55}-\frac{1}{54}\ne0\)
=>x-60=0
<=>x=60
Vậy x=60
- Ta co: \(\frac{323232}{333333}=\frac{32.10101}{33.10101}=\frac{32}{33}\)Va \(\frac{33333333}{34343434}=\frac{33.1010101}{34.1010101}=\frac{33}{34}\)
Khi do ta co: \(\frac{32}{33}va\frac{33}{34}\)
Ta co: \(\frac{32}{33}+\frac{1}{33}=1va\frac{33}{34}+\frac{1}{34}=1\)
Do \(\frac{1}{33}>\frac{1}{34}\)nen \(\frac{32}{33}>\frac{33}{34}\)hay \(\frac{323232}{333333}>\frac{33333333}{34343434}\)
a.
\(\left(\frac{3}{7}\right)^0+\frac{7}{9}\div\left(\frac{2}{3}\right)^2-\left|-\frac{4}{5}\right|=0+\frac{7}{9}\div\frac{4}{9}-\frac{4}{5}=\frac{7}{9}\times\frac{9}{4}-\frac{4}{5}=\frac{7}{4}-\frac{4}{5}=\frac{35}{20}-\frac{16}{20}=\frac{19}{20}\)
b.
\(\frac{10^3+2\times5^3+5^3}{55}=\frac{\left(2\times5\right)^3+2\times5^3+5^3}{55}=\frac{2^3\times5^3+2\times5^3+5^3}{5\times11}=\frac{5^3\times\left(2^3+2+1\right)}{5\times11}=\frac{5^2\times11}{11}=5^2=25\)
c.
\(3^{2009}< 3^{2010}=\left(3^2\right)^{1005}=9^{1005}\)
Vậy 32009 < 91005
Chúc bạn học tốt ^^
\(-\frac{54}{55}\) và \(-\frac{55}{56}\)
Ta có: \(-\frac{54}{55}>-\frac{54}{56}>-\frac{55}{56}\)
\(\Rightarrow-\frac{54}{55}>-\frac{55}{56}\)