All answers should be based on given formulas:

For the following questions, you must use the algebraic approach:

Formulas: n t = a+ (n-1)d tn = ar"-1 n S = - (a+1) S =[2a+(n-1)d] n S = 2 A = P(1+i)" FV = R[(1+i) 1] i - R[1 (1+i)"] PV = i a (r" -1) r-1