Join the Most Relevant JEE Main 2025 Test Series & get 99+ percentile! Join Now
Search any question & find its solution
Question: Answered & Verified by Expert
$\mathrm{S}=\{\mathrm{z} \in \mathrm{C} /|\mathrm{z}-1+\mathrm{i}|=1\}$ represents
MathematicsComplex NumberAP EAMCETAP EAMCET 2023 (15 May Shift 2)
Options:
  • A a circle with centre $(-1,1)$ and radius 1 unit
  • B a circle with centre $(1,2)$ and radius 5 units
  • C a circle with centre $(1,-1)$ and radius 1 unit
  • D an ellipse with centre $(1,-1)$
Solution:
2151 Upvotes Verified Answer
The correct answer is: a circle with centre $(1,-1)$ and radius 1 unit
Since $|z-1+i|=1 \Rightarrow|z-(1-i)|=1$
So, $\mathrm{S}$ represent a circle with centre $(1,-1)$ and radius 1

Looking for more such questions to practice?

Download the MARKS App - The ultimate prep app for IIT JEE & NEET with chapter-wise PYQs, revision notes, formula sheets, custom tests & much more.