Giải phương trình
giải phương trình
a) (x^2 + 1 ) / x + x / (x^2 + 1 ) = -5/2
b)x . (8-x) / (x-1) . ( x - (8-x) / (x-1 ) ) = 15
c) x . [ (5-x)/(x+1)] [ x+ (5-x) / (x+1) = 6
d) [ (7x-x^2) / (x+1) ] . [ (7+x^2) / (x+1) ] = 10
e) [ (3x-x^2) / (x-2) ] . [ (x^2-6)/(x-2)] = 2
a) (x^2 + 1 ) / x + x / (x^2 + 1 ) = -5/2
b)x . (8-x) / (x-1) . ( x - (8-x) / (x-1 ) ) = 15
c) x . [ (5-x)/(x+1)] [ x+ (5-x) / (x+1) = 6
d) [ (7x-x^2) / (x+1) ] . [ (7+x^2) / (x+1) ] = 10
e) [ (3x-x^2) / (x-2) ] . [ (x^2-6)/(x-2)] = 2