The Total solution for NCERT class 6-12
Find the 4th term from the end in the expansion of (4x/5– 5/2x) 9.
Given:
(4x/5 – 5/2x) 9
Let Tr+1 bethe 4th term from the end of the given expression.
Then, Tr+1 is(10 − 4 + 1)th term, i.e., 7th term, from the beginning.
T7 = T6+1
∴ The 4th termfrom the end is 10500/x3.