d:=145-37-55-263

=90-300

=-210

-15/19 + 36/35 - 4/19 + 34/35 = 1 nhé

/HT\ 

TL:

-15/19+36/35-4/19+34/35=1

HT

Bài 1

a: 8/15; 11/15; 15/15; 16/15; 17/15; 19/15

b: 19/42; 19/35; 19/21; 19/19; 19/17

c: 8/10<6/7<16/14<37/35

\(\dfrac{9}{14}+\dfrac{19}{18}+\dfrac{19}{14}+\dfrac{35}{18}=\left(\dfrac{9}{14}+\dfrac{19}{14}\right)+\left(\dfrac{19}{18}+\dfrac{35}{18}\right)=\dfrac{28}{14}+\dfrac{54}{18}=2+3=5\)

\(=\left(\dfrac{9}{14}+\dfrac{19}{14}\right)+\left(\dfrac{19}{18}+\dfrac{35}{18}\right)=2+3=5\)

\(\dfrac{9}{14}+\dfrac{19}{18}+\dfrac{19}{14}+\dfrac{35}{18}\\ =\left(\dfrac{9}{14}+\dfrac{19}{14}\right)+\left(\dfrac{19}{18}+\dfrac{35}{18}\right)\\ =\dfrac{28}{18}+\dfrac{54}{18}\\ =2+3=5\)

`9/14+19/18+19/14+35/18`

`=(9/14+19/14)+(19/18+35/18)`

`=28/14+54/18`

`=2+3`

`=5`

\(A=\frac{19^{30}+5}{19^{31}+5}=>19A=\frac{19^{31}+95}{19^{31}+5}=1+\frac{90}{19^{31}+5}\left(1\right)\)

\(B=\frac{19^{31}+5}{19^{32}+5}=>19B=\frac{19^{32}+95}{19^{32}+5}=1+\frac{90}{19^{32}+5}\left(2\right)\)

từ (1) and (2)

=>19A>19B

=>A>B

bạn viết rõ lũy thừa giúp mình với

\(A=B\)

ý bạn là  như này đk?

A=19²¹+1:19²²+1

B=19²²+1:19²³+1

đề có pải là A=\(\frac{19^{30}+5}{19^{31}+5}\)  ; B=\(\frac{19^{31}+5}{19^{32}+5}\) PẢI KO BẠN