Reference no: EM13859357

1. Given the following function that evaluates a polynomial whose coefficients are stored in an array: double evaluate(double[] coefficients, int n, double x) double result = coefficients[0]; double power = 1; for (inti = 1; i< n; i++) power = power * x; result = result + coefficients[i] * power; return result; Let n be the length of the array. Determine the number of additions and multiplications that are performed in the worst case as a function of n.

2. Suppose the number of steps required in the worst case for two algorithms are as follows: · Algorithm 1: f(n) = 3n 2 + 5 · Algorithm 2: g(n) = 53n + 9 Determine at what point algorithm 2 becomes more efficient than algorithm 1. Consider the following iterative function for problems 3 and 4. int triangular(int n) { int result = 0; for (inti = 1; i<= n; i ++) result += i; return result; }

3. Rewrite the function triangular using recursion and add preconditions and postconditions as comments.

4. Prove by induction that the recursive function you wrote in the previous problem is correct.