Question

the value of 'e'en for which the coefficients of (2r+5)th term and (r+1)th term in the expansion of (1+x)^31 are equal, is?​

Answer 1

Answer:

in gp the product of 1st and 3rd term is 144,2nd and 6th term is 2304.find the tenth termin gp the product of 1st and 3rd term is 144,2nd and 6th term is 2304.find the tenth termin any decreasing arithmetic progression, sum of all its terms, except the first term is equal to - 36in any decreasing arithmetic progression, sum of all its terms, except the first term is equal to - 36in any decreasing arithmetic progression, sum of all its terms, except the first term is equal to - 36