The finite element method(I for three-diwnensional robles Potential enery applied to one eleet m=(4C4EME:d-(卡c-(t:处5 e 2 e Here is the plcture 七一 vre Introduce an abproximstton for the displacement field u wiMin the element =13k=1n D: number of nodes per cement What can be inferred about the appnokimretvon