(1)已知m/n=5/3,则m/m+n+m/m-n=?(2)已知a+1/b=1,b+2/c=1,求c+2/a=?

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(1)已知m/n=5/3,则m/m+n+m/m-n=?(2)已知a+1/b=1,b+2/c=1,求c+2/a=?(1)已知m/n=5/3,则m/m+n+m/m-n=?(2)已知a+1/b=1,b+2/

(1)已知m/n=5/3,则m/m+n+m/m-n=?(2)已知a+1/b=1,b+2/c=1,求c+2/a=?
(1)已知m/n=5/3,则m/m+n+m/m-n=?
(2)已知a+1/b=1,b+2/c=1,求c+2/a=?

(1)已知m/n=5/3,则m/m+n+m/m-n=?(2)已知a+1/b=1,b+2/c=1,求c+2/a=?
1、m/(m+n)+m/(m-n) = 2m²/(m²-n²) = 2-2*(5/3)² = -32/9
2、(a+1)/b=1 有括号没?

(1) =2
(3) =3