Question

find the multiplicative inverse of 3 (7+i7)+i (7+i7)​

Answer 1

Answer:

hi

Step-by-step explanation:

multiplicative inverse of 3 is -3

Answer 2

Answer:

14-28i/980

Step-by-step explanation:

3(7 + i7) + i(7 + i7)

=21+21i+7i+7i2

Now i2=-1

So

=21+28i-7

=14+28i

Let z=14+28i

Conjugate is given by

=14-28i

Modulus is given by

|z| =

$\sqrt{ {14}^{2} + {28}^{2} } = \sqrt{196 + 784} = \sqrt{980} = 31$

Multiple inverse of any complex number z is given by

(conjugate of z)/(|z|)²=14-28i/980