A can contains a mixture of two liquids A and B in the ratio 7:5. When 9 liters of mixtures are drawn off and the can is filled with B, the ratio of A and B becomes 7:9. How many liters of liquid A was contained by the can initially?
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