Consider the sequence a = (an ) where an = n2 + 3n+2 Which one of the following sequences b = (bn ) satisfies Ab = a? Hint: Take advantage of the fact that the multiple-choice format allows you to guess the antidifference and try differencing it. O bn = 2-1 n! O bn = n+1 n O bn = O bn = n'+1 n+1 O bn = O bn =