Question 41100
Given expression: {{{(1/x - 1/b)/(1/(xb) + 1/2)}}}
= {{{((b - x)/(bx))/((2 + xb)/(2xb))}}}
= {{{((b - x)/(2 + xb))*(2xb/(bx))}}}
= {{{2*(b - x)/(2 + xb)}}}