
解答:
(a方b方)/(a4次方-2b4次方)=1
(a方-b方)=(a的4次方-b的4次方)/(a方+b方)
所求的分式方程={(a的4次方-b的4次方)/(a方+b方)}*(1/19a方+97b方)
=(a的4次方-b的4次方)/(19a的4次方+97a方b方+19a方b方+97b四次方)
=(a的4次方-b的4次方)/(19a4次方+116a方b方+97b4次方)
因为a方b方=a4次方-2b4次方
所以原式=(a4次方-b4次方)/(19a4次方+116a4次方-232b4次方+97b4次方)
=(a4次方-b4次方)/(135a4次方-135b4次方)=1/135