The complex number .Write down the argument for and find the exact value of |z^2| .

My working :

Up to here , did i make any mistake . My final answer is wrong so i am wondering where my mistake is . Can someone pls check for me ? Thanks .

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- December 10th 2008, 05:05 AMmathaddictcomplex number help
The complex number .Write down the argument for and find the exact value of |z^2| .

My working :

Up to here , did i make any mistake . My final answer is wrong so i am wondering where my mistake is . Can someone pls check for me ? Thanks . - December 10th 2008, 12:53 PMSoroban
Hello, mathaddict!

Quote:

Given: . .

Find the argument for and find the exact value of

My working:

Up to here, did i make any mistakes? . . . . no

My final answer is wrong. . You could have shown it to us.

We have: .

The argument is given by: .

Hence: .

The magnitude of is: .

Therefore: .