Question

解方程：（1）1/3根号27a3次方-a平方根号3/a+3a根号a/3-4/3根号108a3次方

Answer 1

1、(1/3)*[3a*根号(3a)] - a*a*根号(3a)/a + 3a*根号(3a)/3 - (4/3)*6a*根号(3a) = -7a*根号(3a)2、(a + 1/a)^2 = a^2 + 2 + 1/a^2 = (a - 1/a)^2 + 4 = 6；所以a+1/a为±根号63、x^2 + 2xy + y^2 = (x + y)^2 = (根...