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4-1.Complex numbers
medium
જો $z_1, z_2 $ બે સંકર સંખ્યા હોય , તો $|{z_1} + \sqrt {z_1^2 - z_2^2} |$ $ + |{z_1} - \sqrt {z_1^2 - z_2^2} |$ = . . . .
A
$|{z_1}|$
B
$|{z_2}|$
C
$|{z_1} + {z_2}|$
D
$|{z_1} + {z_2}| + |{z_1} - {z_2}|$
Solution
(d)Trick : Check by putting ${z_1} = 1 + 0i$and ${z_2} = 0 + i$ .
Standard 11
Mathematics
