X 0 1 2 3 4 5 p() 0.5905 0.3281 0.0729 0.0081 0.00045 0.00001 (1)p(2)=0.0729; (2)之p(x)=Q.0081+0.00045+0.00001=0.0086; x=3 (3)∑p(x)=0.5905+0.3281+0.0729+0.0081=0.9954; x=0 (42p(x)=1-p0)=1-0.5905=0.4095 ( ) p( x ) p( ) . . . ( ) p( x ) . . . . . ; ( ) p( x ) . . . . ; ( ) p( ) . ; xxx 4 1 0 1 0 5905 0 4095 3 0 5905 0 3281 0 0729 0 0081 0 9954 2 0 0081 0 00045 0 00001 0 0086 1 2 0 0729 5 13 0 5 3 = − = − = = + + + = = + + = = === X 0 1 2 3 4 5 p(x) 0.5905 0.3281 0.0729 0.0081 0.00045 0.00001