AP EAMCET · Maths · Binomial Theorem
If the term independent of in the expansion of is then
- A only
- B only
- C
- D
Answer & Solution
Correct Answer
(C)
Step-by-step Solution
Detailed explanation
Tr+1=10cr·x10-r2-kr·x-2r ⇒10-r2-2r=0 ⇒10-r=4r ⇒r=2 T3=10c2(-k)2=405 ⇒45k2=405 ⇒k2=9 ⇒k=±3
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