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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 10: 4/ căn 3+1 -5/ căn 3-2 +6/ căn 3-3

Toán Lớp 10: 4/ căn 3+1 -5/ căn 3-2 +6/ căn 3-3

Comments ( 1 )

  1. Giải đáp:
    4/(sqrt3+1)-5/(sqrt3-2)+6/(sqrt3-3)
    =4/(sqrt3+1)+5/(2-sqrt3)-6/(3-sqrt3)
    =(4(sqrt3-1))/(3-1)+(5(2+sqrt3))/(4-3)-(6(3+sqrt3))/(9-3)
    =(4(sqrt3-1))/2+(5(2+sqrt3))/1-(6(3+sqrt3))/6
    =2(sqrt3-1)+5(2+sqrt3)-(3+sqrt3)
    =6sqrt3+5

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222-9+11+12:2*14+14 = ? ( )

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