NDA 2018 Mathematics question
What is the number of non-zero terms in the expansion of (after simplification)?
Answer: (C)
Solution
On adding, the odd powers of cancel and the even powers remain (doubled). That is 6 non-zero terms.
What is the number of non-zero terms in the expansion of (after simplification)?
On adding, the odd powers of cancel and the even powers remain (doubled). That is 6 non-zero terms.