- #1
stunner5000pt
- 1,461
- 2
Find [tex] \int_{C} 3(z-i)^2 dz [/tex] where C is the circle |z-i|=4 traversed once clockwise
well i know it is zero but i just want to prove it.. kind of
so we can parametrize [tex] z(t) = i + 4e^{it}, \ 0\leq t \leq 2 \pi [/tex]
so
[tex] \int_{C} 3(z-i)^2 dz = \int_{0}^{2\pi} 3(i + 4e^{it}-i)^2 (4ie^{it}) dt [/tex]
is the setup good?
Also
Compute [itex] \int_{\Gamma} \overline{z} dz [/tex] where Gamma is the circle |z|=2 tranversed once counterclockwise
[tex] z(t) = 2e^{it} [/tex]
[tex] \int_{0}^{2\pi} (-2e^{it}) (2i e^{it}) dt [/tex]
is this correct??
Thank you for the help!
well i know it is zero but i just want to prove it.. kind of
so we can parametrize [tex] z(t) = i + 4e^{it}, \ 0\leq t \leq 2 \pi [/tex]
so
[tex] \int_{C} 3(z-i)^2 dz = \int_{0}^{2\pi} 3(i + 4e^{it}-i)^2 (4ie^{it}) dt [/tex]
is the setup good?
Also
Compute [itex] \int_{\Gamma} \overline{z} dz [/tex] where Gamma is the circle |z|=2 tranversed once counterclockwise
[tex] z(t) = 2e^{it} [/tex]
[tex] \int_{0}^{2\pi} (-2e^{it}) (2i e^{it}) dt [/tex]
is this correct??
Thank you for the help!
Last edited: