1 votes 1 votes How to solve the recurrence relation either by recursion tree or back substitution T(n)= O(1) , if n<=80 = T(n/5)+T(7/10n +6) + O(n) if n>80 Meenakshi Sharma asked Jul 9, 2017 Meenakshi Sharma 166 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.