(1)√8又1/10=√81/10=9√10/10.
(2)√(x-1)/75=√3(x-1)/15.
(3)m√8/27=2m√6/9.
(4)由2√5x=√1又1/5
20x=6/5,
x=3/50.
(5)由y=[√(x-2)+√(2-x)+1]÷(x+2)
∵x-2≥0,∴x≥2,
又2-x≥0,∴x≤2,得x=2,
∴y=1÷4=1/4,
√(x+y)÷√(x-y)
=√9/4÷√7/4
=√9/7
=3√7/7.
(1)√8又1/10=√81/10=9√10/10.
(2)√(x-1)/75=√3(x-1)/15.
(3)m√8/27=2m√6/9.
(4)由2√5x=√1又1/5
20x=6/5,
x=3/50.
(5)由y=[√(x-2)+√(2-x)+1]÷(x+2)
∵x-2≥0,∴x≥2,
又2-x≥0,∴x≤2,得x=2,
∴y=1÷4=1/4,
√(x+y)÷√(x-y)
=√9/4÷√7/4
=√9/7
=3√7/7.