Tìm hai số tự nhiên a,b (a > b) biết rằng BCNN (a, b)= 24 và ƯCLN (a, b) =4
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DL
5 tháng 2 2018
BCNN(a,b) .ƯCLN(a,b) = a .b = 24.4 = 96
Ta có : a > b nên
a = 4m
b = 4n
m > n ; (m,n) = 1
a . b = 4m.4n=96
16(m.n)=96
m.n=6
Lập bảng các giá trị của m và n rồi tính a và b nha :)
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
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29 tháng 10 2016
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