(6)求f(x)=ln(1-x2)在x=0点的 Taylor,展开式。 (7)设f(t) ∫(x2+2y2)drdy,求hinf(t) x2+y2<t2(6)¦f(x) = ln(1 − x 2 )3x = 0:TaylorÐmª" (7)f(t) = RR x2+y 2≤t 2 (x 2 + 2y 2 ) d x d y, ¦ lim t→0+ f(t) t 4 . 3