SOLUTION: i) Expand z = {{{(1+ic)^6}}} in powers of c ii) Hence find the 5 real values of c for which z is real.

SOLUTION: i) Expand z = {{{(1+ic)^6}}} in powers of c ii) Hence find the 5 real values of c for which z is real.

Algebra.Com

Question 1152858: i) Expand z = in powers of c
ii) Hence find the 5 real values of c for which z is real.
Answer by greenestamps(13200) (Show Source): You can put this solution on YOUR website!

We want the imaginary part to be 0:

OR OR

The 5 values of c for which the expression is real are

and
and

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