Two cheaper books = x
more expensive = 1.5x
so, 2.5x=150
150/2.5=x=60
therefore the more expensive book = 90
3,6,12,24,48,96,192,384,768,1536,3072,6144 all you have to do is multiply the last number by 2
If correct please mark Brainliest.
Kindly refer to attachment for solution.
Hope it helps ^_^