Write out the form of the partial fraction decomposition of the function (as in this example). do not determine the numerical values of the coefficients. (a) x4 β 2x3 + x2 + 7x β 5 x2 β 2x + 1 x2β a xβ1ββ b (xβ1)2β (b) x2 β 1 x3 + x2 + x