Question 930602
{{{ (3*2^(x +  1) -4(2^(x-1)))/(2^(x + 1) -2) }}}
= {{{ (3*2^(x +  1) - 2^2*(2^(x-1)))/(2^(x + 1) -2) }}}
= {{{ (3*2^(x +  1) - (2^(x+1)))/(2^(x + 1) -2) }}}
= {{{ 2*2^(x +  1)/(2^(x + 1) -2) }}}
= {{{ 2^(x +  1)/(2^(x) -1) }}}