I n = 2 ( p x + q ) n a x + b a ( 2 n + 1 ) + 2 n ( a q  @-@  b p ) a ( 2 n + 1 ) I n  @-@  1 { \ displaystyle I _ { n } = { \ frac { 2 ( px + q ) ^ { n } { \ sqrt { ax + b } } } { a ( 2n + 1 ) } } + { \ frac { 2n ( aq @-@ bp ) } { a ( 2n + 1 ) } } I _ { n @-@ 1 } \ , \ ! }.
