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d.
\(-\frac{31}{30}< -1\)
\(-1< -\frac{45}{47}\)
\(\Rightarrow-\frac{31}{30}< -\frac{45}{47}\)
Chúc bạn học tốt
a)\(\frac{18}{-39}=-\frac{18}{39}\)
Vì -17>-18 nên \(-\frac{17}{39}>-\frac{18}{39}\)(1)
Vì 39<41 nên \(-\frac{17}{39}< -\frac{17}{41}\)(2)
Từ (1);(2)=>\(\frac{-18}{39}< -\frac{17}{39}< -\frac{17}{41}\)
b)Ta có: \(\frac{42}{-37}=-\frac{42}{37}>\frac{-42}{35}=\frac{-6}{5}=-1,2\); \(-\frac{56}{43}< -\frac{55}{43}< -\frac{55}{44}=-\frac{5}{4}=-1,25\)
Vì -1,2>-1,25 nên 42/-37>-56/43
c)Ta có:25049<25259 hay 37*677<67*377 nên 37/67<377/677
d)Ta có:\(\frac{5}{8}=\frac{10}{16}< \frac{34}{16}=\frac{17}{8}< \frac{17}{19}\); \(\frac{17}{19}< 1;\frac{22}{17}>1=>\frac{22}{17}>\frac{17}{19}\)
=>\(\frac{22}{17}>\frac{17}{19}>\frac{5}{8}\)
làm hơi lâu
\(a.\)
\(625^{17}=\left(5^4\right)^{17}=5^{68}\)
\(125^{19}=\left(5^3\right)^{19}=5^{57}\)
Vì \(5^{68}>5^{57}\Rightarrow625^{17}>125^{19}\)
a) \(\frac{325}{260}=\frac{650}{520}< \frac{650}{320}< \frac{876}{320}\)
\(\Rightarrow\frac{325}{260}< \frac{876}{320}.\)
b) \(\frac{13}{9}< \frac{24}{9}=\frac{8}{3}\)
\(\Rightarrow\frac{13}{9}< \frac{8}{3}.\)
c) Do \(18>-17;-39< 41\)
\(\Rightarrow\frac{18}{-39}>\frac{-17}{41}.\)
d) \(\frac{-151515}{232323}=\frac{\left(-15\right).10101}{23.10101}=\frac{-15}{23}\)
Mà \(\frac{-15}{25}< \frac{-15}{23}\)
\(\Rightarrow\frac{-15}{25}< \frac{-151515}{232323}.\)
a: \(\dfrac{17}{30}=\dfrac{1564}{30\cdot92}\)
\(\dfrac{51}{92}=\dfrac{1530}{30\cdot92}\)
mà 1564>1530
nên 17/30>51/92
b: \(\dfrac{-45}{47}>-1>-\dfrac{31}{30}\)
c: \(\dfrac{67}{22}=3+\dfrac{1}{22}\)
\(\dfrac{152}{51}=3+\dfrac{1}{51}\)
mà 1/22>1/51
nên 67/22>152/51
=>22/67<51/152
d: 17/39>17/41
nên -17/39<-17/41
=>-18/39<-17/39<-17/41
a, \(\frac{-22}{35}>\frac{-22}{177}>\frac{-103}{177}\)
=>\(\frac{-22}{35}>\frac{103}{177}\)
b, \(\frac{-17}{23}>\frac{-17}{31}>\frac{-25}{31}\)
=>\(\frac{-17}{23}>\frac{-25}{31}\)
Chúc bạn học giỏi nha!!!
K cho mik vs nhé Nguyễn Mai
a) Phân số trung gian là: \(\frac{-103}{35}\)
Ta có: \(\frac{-22}{35}>\frac{-103}{35}>\frac{-103}{177}\Rightarrow\frac{-22}{35}>\frac{-103}{177}\)
b) Phân số trung gian là: \(\frac{-25}{23}\)
Ta có: \(\frac{-17}{23}>\frac{-25}{23}>\frac{-25}{31}\Rightarrow\frac{-17}{23}>\frac{-25}{31}\)
a) \(\frac{17}{30}>\frac{51}{92}\)
b) \(\frac{-45}{47}>\frac{31}{-30}\)
c) \(\frac{22}{67}< \frac{51}{152}\)
d) \(-\frac{17}{39}< -\frac{17}{41};\frac{18}{-39}< -\frac{17}{41}\)