Toán Lớp 7: $(1/3-2x)^{2022}$ + $(3y-x)^{2024}$ = 0
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Toán Lớp 7: $(1/3-2x)^{2022}$ + $(3y-x)^{2024}$ = 0
Comments ( 2 )
Ta có:
{((1/3-2x)^2022ge0forallx),((3y-x)^2024ge0forallx;y):}
=>(1/3-2x)^2022+(3y-x)^2024ge0forallx;y
Mà (1/3-2x)^2022+(3y-x)^2024=0
=>{((1/3-2x)^2022=0),((3y-x)^2024=0):}
=>{(1/3-2x=0),(3y-x=0):}
=>{(2x=1/3-0),(3y=0+x):}
=>{(2x=1/3),(3y=x):}
=>{(x=1/3:2),(3y=x):}
=>{(x=1/3 . 1/2),(3y=x):}
=>{(x=1/6),(3y=1/6):}
=>{(x=1/6),(y=1/6:3):}
=>{(x=1/6),(y=1/6 . 1/3):}
=>{(x=1/6),(y=1/18):}
Vậy x=1/6;y=1/18