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Ta có : 12/49 = 156/637
13/47 = 156/564
=> 156/637 < 156/564
Vâỵ 12/49 < 13/47
# chúc bạn học tốt #
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never gonna give you up
never gonna let you down
never gonna run around
desert you
never gonna make you cry
never gonna say goodbye
never gonna tell a lie
and hurt you :)
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a ) − 1 < 1 ; b ) 9 15 > 7 15 ; c ) − 1 2 > − 7 12 ; d ) 71 20 < 4
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a: \(\dfrac{12}{49}< \dfrac{13}{49}< \dfrac{13}{47}\)
b: \(\dfrac{12}{47}>\dfrac{19}{47}>\dfrac{19}{77}\)
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12/49 > 13/47
64/85 > 73/81
19/31 > 17/35
67/77 > 73/83