This question is from binomial theorem and i have made this solution in this way . I want to know that is it correct or wrong ?I have confusion in step.A (marked in the solution)If my solution is correct then how it is possible to write I An = 1/nCo+1/nC1+......+1/nCnas 2(summation of half terms of the An).I have querry about it's middle term because total number of terms of this expression is not mentioned. . I am confused that if total terms will be odd then it is not possible .Then how u say it right to write .plzzz explain

Sushant Prasad , 4 Years ago

Grade 12