Q. 10 F5.0( 3 Votes )

Find the modulus of each of the following:

Answer :


Firstly, we calculate and then find its modulus

[ i2 = -1]

Now, we rationalize the above by multiplying and divide by the conjugate of 1 + i


Now, we know that,

(a + b)(a – b) = (a2 – b2)

So, eq. (i) become

[ i2 = -1]

[ i2 = -1]

= 2 – i

Now, we have to find the modulus of (2 – i)


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