Let dn denote the number of ways to cover the squares of a 2-by-n board using plain dominos. then it is easy to see that d1 = 1, d2= 2, and d3 = 3. compute a few more values of dn and guess an expression for the value of dn and use induction to prove you are right.

Ifound this on google “a skewed (non-symmetric) distribution is a distribution in which there is no such mirror-imaging. a "skewed right" distribution is one in which the tail is on the right side. a "skewed left" distribution is one in which the tail is on the left side. the above histogram is for a distribution that is skewed right.” i hope this you for what your looking for

(-14+3/2b) - (1+8/2b) = -5 -5/2b(-10+b) + (7b-5) = 8b-15(7/2b-3) - (8+6b) = -5/2b-11(5+2b) + (2b+3/2) = 4b+ 13/2