Ta có:1-1995/1996=1/1996

1-1996/1997=1/1997

Vì 1/1996>1/1997=>1995/1996<1996/1997

b, 2121/3737=2121/101=21

                       3737/101=37

212121/373737=212121/10101=21

                           373737/10101=37

=>2121/3737=212121/373737

a) \(\dfrac{1995}{1996}\) < \(\dfrac{1996}{1997}\)

b) \(\dfrac{2121}{3737}\) = \(\dfrac{212121}{373737}\)

1995/1996 = 1/1996 

1996/1997 = 1/1997

1/1996  > 1/1997 nên 1995/1996 < 1996/1997

1- 1995/1996=1/1996

1-1996/1997=1/1997

1/1996>1/1997->1995/1996<1996/1997

 tự làm là hạnh phúc của mỗi công dân.

$\frac{1988.1996+1997+1995}{1997.1996-1995.1996}$

=> $\frac{1996.(1988+2)}{1996.(1997-1995)}$

=> $\frac{1996.1990}{1996.2}$

=> $\frac{1990}{2}$

=> 995

\(\frac{1988\cdot1996+1997+1995}{1997\cdot1996-1995\cdot1996}\)

=\(\frac{1996\cdot\left(1988+2\right)}{1996\cdot\left(1997-1995\right)}\)

=\(\frac{1996\cdot1990}{1996\cdot2}\)

=\(\frac{1990}{2}\)=995

ta có 1995/1996=1-1/1996

        1996/1997=1-1/1997

vì 1/1996>1/1997 suy ra 1995/1996<1996/1997

phân số lớn hay bé là :

1995/1996 < 1996/1997

đáp số : <

1995/1996<1996/1997

KQ = 995

Mình mới giải xong, mất tiêu bài rồi KQ=1000

a) \(\dfrac{1997x1996-1}{1995x1997+1996}=\dfrac{1997x\left(1995+1\right)-1}{1995x1997+1996}\)

\(=\dfrac{1997x1995+1997-1}{1995x1997+1996}=\dfrac{1997x1995+1996}{1995x1997+1996}=1\)

b) \(\dfrac{1997x1996-995}{1995x1997+1002}=\dfrac{1997x\left(1995+1\right)-995}{1995x1997+1002}\)

\(=\dfrac{1997x1995+1997-995}{1995x1997+1002}=\dfrac{1997x1995+1002}{1995x1997+1002}=1\)

\(...=\dfrac{1998x1996+1996+1+1996-1}{\left(1997-1995\right)x1996}\)

\(=\dfrac{1998x1996+2x1996}{2x1996}=\dfrac{1996\left(1998+2\right)}{2x1996}=\dfrac{2000}{2}=1000\)

KQ = 995 nha

995

ta có 1-1995/1996=1/1996

1-1996/1997=1/1997

vì 1/1996>1/1997

=>1995/1996<1996/1997

Ta lấy phần bù

\(1-\frac{1996}{1997}=\frac{1}{1997}\)

\(1-\frac{1995}{1996}=\frac{1}{1996}\)

\(\frac{1}{1997}< \frac{1}{1996}\)

Nhưng vì tìm phần bù nên ta đảo dấu

\(\Rightarrow\frac{1995}{1996}< \frac{1996}{1997}\)

ủng hộ mình nha

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