由下列數(shù)據(jù) 確定的唯一插值多項(xiàng)式的次數(shù)為()
A.4 B.2 C.1 D.3
設(shè)li(x)是以xk=k(k=0,1,...,9)為節(jié)點(diǎn)的Lagrange插值基函數(shù),則=()
A.x B.k C.i D.1