Teaching DSSSB PGT Mock Test 2025 Mathematics Complex Numbers Properties of Complex Numbers

यदि z एक ऐसी सम्मिश्र संख्या है कि \(\frac{z-1}{z+1}\) शुद्धत: अधिकल्पित है, तो |z| किसके बराबर है? 

1
\(\frac{1}{2}\)
2
\(\frac{2}{3}\)
3
1
4
2
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