Question

how many zero of the function f(x)z^3+2)/z?
and (2z-1)^7/z^3

Answer 1

f(x) = z^3 + 2/z ?

Answer 2

did you mean f(z)?...

Answer 3

yes
(z^3+z)/z

Answer 4

set f(z) = 0
and solve for z.

Answer 5

0 = z(z^2+1)/z
0 = z^2 + 1 ...

Answer 6

and the same for the other one.

Answer 7

i think we have two zero is that correct?

Answer 8

yeah.

Answer 9

but the answer in my book said no zero

Answer 10

well its complex roots.

Answer 11

z^2 + 1 = 0
z = +/- i

Answer 12

yes but i confuse we the answer no zero