X can do a piece of work in 24 days. When he had worked for 4 days, Y joined him. If the work was completed in 16 days, Y alone can finish that work in:
log2+log4+log8+----- ধারাটির প্রথম দশটি পদের সমষ্টি কত?
45 log2
55 log2
65 log2
75 log2
169 is equal to----
11
১৩
১৫
17