The average of x, 1x and 1x2 is
A. 1+x23x
B. 1+x2+x33x2
C. 1+x+x23x2
D. 1x+x23x
E. 1+x2+x33
A. 1+x23x
B. 1+x2+x33x2
C. 1+x+x23x2
D. 1x+x23x
E. 1+x2+x33