ExamBro
ExamBro
enEnglishhiहिन्दीguગુજરાતી
JEE Mains · Maths · STD 11 - 4.1 complex nubers

ધારોકે \(z=(1+i)(1+2 i)(1+3 i) \ldots .(1+n i)\), જ્યાં \(i=\sqrt{-1}\). જો \(|z|^2=44200\) હોય, તો \(n=\) ___ .

  1. A 4
  2. B 5
  3. C 6
  4. D 7
Verified Solution

Answer & Solution

Correct Answer

(B) 5

Step-by-step Solution

Detailed explanation

\(|z|^2=2^3 \cdot 5^2 \cdot 13 \cdot 17\) \(\prod_{r=1}^n\left(1+r^2\right)=2^3 \cdot 5^2 \cdot 13 \cdot 17=(2) \cdot(5) \cdot(2 \cdot 5) \cdot(17) \cdot(2 \cdot 13)=2 \cdot 5 \cdot 10 \cdot 17 \cdot 26\) \(\text { so } n=5\)
Same subject
Explore more questions on app
From JEE Mains
Explore more questions on app