AP EAMCET · Maths · Complex Number
- A
- B
- C
- D
Answer & Solution
Correct Answer
(D)
Step-by-step Solution
Detailed explanation
Given: ∑k=040ik=x+iy ⇒i0+i+i2+i3+i4+i5+i6+i7+i8+...+i37+i38+i39+i40=x+iy ⇒i0+0=x+iy ⇒x+iy=1 So, x=1, y=0 Therefore, x100+x99y+x242y2+x97y3=1
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