Teaching DSSSB TGT Mock Test 2025 Engineering Mathematics Complex Variables Complex Functions

Consider the analytic function \(f(z) = x^2 - y^2 + i2xy\)   of the complex variable z = x + iy, where . The derivative f’(z) is

1
2x + i2y
2
x2 + iy2
3
x+ iy
4
2x – i2y
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