Transform the following product by making the change of variable i = k + 1
When k = 1 then i = ____ So when k and k/(k ² + 7) : are expressed in terms of i, the results are i = ____ₐnd k/(k ² + 7) = ____ₚrod k = 1 to n k/(k ² + 7) = prod i=2 ⁿ+1 ____.