Question

If U(z)=(2z? +5z+14)/(z-1)^4,
evaluate u2 and U3.​

Answer 1

Step-by-step explanation:

U(z)=(2z^2+5z+14)/(z-1)^4

U(2)=(2(2^2)+5(2)+14)/(2-1)^4

=(2(4)+10+14)/(1)^4

=(8+10+14)/1

=32/1

U(2)=32

U(3)=(2(3)^2+5(3)+14)/(3-1)^4

=(2(9)+15+14)/(2^4)

=(18+15+14)/16

=3780/16

U(3)=945/4 or 236.25