Question # 6. (7 marks) x+1 2= a o Reuwrite this expression so that we have x in terms of u. (a) Suppose we know u (b) Starting with your expression in (a), differentiate both sides and rearrange to express dx in terms of u and du. 2 (c) Using the technique of partial fractions which we learned, simplify / ( 221/, . du. u _ )2 r+1 T+ 2 2 = to (d) By making explicit reference to each of the previous parts of this problem, use the substitution u simplify/\\/%dx. T