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A 16X5X9X3X4/3X5X16X9X4=1/1=1
B 1996X1995-1996X1/1994X1+1995X1994
=1995X(1996-1)/1995X(1994+1)=1995X1995/1995X1995
=1/1=1
\(\frac{1997x1996-1}{1995x1997+1996}\)
\(=\frac{1997x\left(1995+1\right)-1}{1997x1996+1996}\)
\(=\frac{1997x1995+1997-1}{1997x1995+1996}\)
\(=\frac{1997x1995+1996}{1997x1995+1996}\)
=1
1997x1996-1/1995x1997+1996
=1997x(1995+1)-1/1995x1997-1996
=1997x1995+1997x1-1/1995x1997+1996
=1997x1995+1996/1995x1997+1996
=1
Tích nha
Ta có:\(\frac{5}{9}.\frac{3}{5}:\frac{2}{9}\)
\(\Rightarrow\frac{5}{9}.\frac{3}{5}.\frac{9}{2}\)
\(=\frac{3}{2}\)
Chúc bạn hok tốt
\(\frac{1}{3}+x\times\frac{2}{7}=\frac{11}{12}\)
\(x\times\frac{2}{7}=\frac{11}{12}-\frac{1}{3}\)
\(x\times\frac{2}{7}=\frac{7}{12}\)
\(x=\frac{7}{12}:\frac{2}{7}\)
\(x=\frac{49}{24}\)
~Moon~
\(\frac{1}{3}+x.\frac{2}{7}=\frac{11}{12}\)
\(x.\frac{2}{7}=\frac{11}{12}-\frac{1}{3}\)
\(x.\frac{2}{7}=\frac{7}{12}\)
\(x=\frac{7}{12}\div\frac{2}{7}\)
\(x=\frac{49}{24}\)
\(\frac{1997x1996-1}{1995x1997+1996}\)
\(=\frac{1997x1996-1}{1995x1997+1997-1}\)
\(=\frac{1997x1996-1}{1997x\left(1995+1\right)-1}\)
\(=\frac{1997x1996-1}{1997x1996-1}\)
\(=1\)( vì tử số = mẫu số )
Tham khảo nha !!!
\(\frac{1997\times1996-1}{1995\times1997+1996}\)
= \(\frac{1997\times\left(1995+1\right)-1}{1995\times1997+1996}\)
= \(\frac{1997\times1995+1997-1}{1995\times1997+1996}\)
= \(\frac{1997\times1995+1996}{1995\times1997+1996}\)= 1