Equation Icon  [ ] [ ] a ( a)2 1- c d 3 ( 0 β) 1- c d 3 ( b β) dt = 1 − aaˆx + aaˆx − 2 R0c0dxˆ ˆx + O (s ) ¯eβdx + − 6R0cbdˆx ˆx + O (s ) ¯eβdx (9.8 )