φHφdx=-(h2/872m)/(k-x2)d2(kxdx2dx =h2/(4m2m)/(x2-kx)dx h2/(242m) ∫φ*dx=∫x2(-x)2dx=F/30 E6=5h2(4mPm)≥h2/(8m/)=E1 f* H f dx = -(h2 /8 2m)  (lx-x 2 ) d2 (lx-x 2 )/dx2 dx = h2 /(4 2m)  (x2 - lx) dx = h2 l 3 /(24 2m)  f*f dx =  x 2 (l-x)2 dx = l 5 /30 Ef = 5h2 /(4 2 l 2m)  h 2 /(8ml 2 ) = E1