The total number of irrational terms in the binomial expansion of (7^(1/5))⁶⁰ is:
55
49
48
54
Solution:
Given (7^(1/5))⁶⁰ has 61 terms General term T_(r+1) = ⁶⁰C_r (7^(60-r)/5) (5^(3r)/10) ∴for rational term, r = 0, 10, 20, 30, 40, 50, 60 ⇒ no of rational terms = 7 ∴ number of irrational terms = 61 - 7 = 54