in the sequence above, each term after is determined by multiplying by x and then adding y. if x and y are each greater than zero, and if they are integers, then what does the term x + y equal

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.