Please help me with these two questions. I am having trouble understanding what to do. Thank you Determine a formula for 12 +For n=1, 1/2+2.31+ + +2:3n-(n+1)+n.(n+1). (Enter the fraction in the form a/b.)(Click to select) vFor n = 2,1++ ... +(Click to select)1-22-3n.(n+1)1For n = 3,+1-22.3For n = 4, 1/2++ ++ ... +(Click to select) ▼n.(n+1)1.+2.3D(Click to select) ✓n-(n+1)1For n = 5, ++ .+=(Click to select) ▼1:22.3n.(n+1)Identify the formula for the given sum, derived from the values obtained n = 1 to 5.On/(n - 1)On/(n + 1)O (n+2)/(n+1)O(n+1)/nO (n - 1)/(n+1) part.Give a big-O estimate for each of these functions. For the function g in your estimate f(x) is O(g(x)), use a simple function gof smallest order.If f(x) = (n+n2+ 5)(n!+ 5") then g(x) =Multiple Choicen!nnn+n!nnn!

Determine a formula for 12+ For n=1, + For n = 2, 12+ For n = 3, 1 1-2 For n = 4, 12+ 1 2-3 + + n.(n+1) (Enter the fraction in the form alb.) 1 + 2-3 n-(n+1) =(Click to select) v 1 + + 2-3 n-(n+1) =(Click to select) V 1 + + ... + 2-3 n.(n+1) =(Click to select) V 1 1 For n = 5, 1½ + 1 + + ... + 2-3 n.(n+1) =(Click to select) V 1-2 2.3 : + 1 n.(n+1) =(Click to select) V Identify the formula for the given sum, derived from the values obtained n = 1 to 5. On/(n - 1) n/(n+1) O (n+2)/(n+1) O (n+1)/n O (n − 1)/(n + 1)