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28 tháng 11 2017

Vì  ƯCLN ( a ; b ) = 5 và BCNN ( a ; b ) = 60

=>  ƯCLN ( a ; b ) . BCNN ( a; b ) = 5 . 60 = 300 = a.b

Có ƯCLN ( a ; b ) = 5

=> a chia hết cho 5 = 5k

     b chia hết cho 5 = 5q ( k ; q ) = 1

=> a.b = 5k . 5q

           =( 5 . 5 ) .( k . q )

           =  25 . kq = 300

=> kq = 300 : 25 = 12

Ta có bảng

k12134
q11243
a3002575100
b2530010075

Vậy ( a ; b ) = ( 300 ; 25 ) ; ( 25 ; 300 ) ; ( 75 ; 100 ) ; (  100 ; 75 )

           

18 tháng 12 2019

Thank dat dang

31 tháng 1 2022

UKM

^6^7g^7*(KHV C GTGFCCGttedx

8 tháng 12 2015

a) goi hai so la a ; b va a >b

vi UCLN(a,b)=18=>a=18k            ;       b=18q       (trong do UCLN (k,q)=1 va k>q)

=>a+b=162

18k+18q =162

18(k+q)=162

k+q=9

ta co bang sau   

 

k1234
q8765
a18365472
b14412610890

vay ...........

   
    
    

 

29 tháng 10 2016

21453 

52542000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000

542454550212.100000000000000000000000000000000000000000000000000000000000000000000000000000
  
  
18 tháng 11 2021
Mn giúp mik vs