kill(all)$

van=facebook.com/LearningCalculus$

c:(2^(7*sqrt(2)))^(1/8);

float(c);

f(a,b):=b^(1/a) * a^(1/b) = c;

f(x,y);

assume(x>0,y>0);

limit(f(x,y),x,inf);

limit(f(x,y),y,inf);