tim cac cap so nguyen a,b
a\5-2\b=2\15
PJ
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Tim cac cap so nguyen thoa man dieu kien :
1/a+b/2=5/8
tim cac cap so nguyen x; y biet
x^2+2y^2+3xy+3x+5y=15
Tim cac cap so nguyen x;y sao cho x^2+y^2=5
có 4 cặp:
x=1;y=2
x=-1;y=-2
x=-1;y=2
x=1;y=-2
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Tim tat cac cac cap so nguyen x,y thoa man a) x^2+5xy+4y^2
b)xy-2x+3y-1
Tim tat cac cac cap so nguyen x,y thoa man a) x^2+5xy+4y^2
b)xy-2x+3y-1
Tim tat cac cac cap so nguyen x,y thoa man a) x^2+5xy+4y^2
b)xy-2x+3y-1
hai cap so nguyen to hon kem nhau 2 don vi goi la cap so nguyen to sinh doi. tim cac cap so nguyen to sinh doi nho hon 100
tim cac cap so nguyen duong nguyen to cung nhau sao cho: (x+y)/(x^2+y^2)=7/25
tim cac cap so nguyen m , n thoa man : 2^m - 2^n =2048
Ta có: 2048 = 211 = 211. (2 - 1) = 212 - 211
Vậy 2m - 2n = 212 - 211 => m = 12; n =11
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