If the 4th term in the expansion of (px+x^ -1 )^m is 2.5 for all x R then

JEE Advanced Mathematics question

If the 4th term in the expansion of is 2.5 for all then

Answer: (B)

. For this to be the constant for all : , and then

Create a free account to read the complete working, and practise questions like this in a timed test.

Question ID VK-108310