Question

Can someone help me to solve it by Matlab?

17. Write a script which does the following: S- Σ IMPORTANT! Make sure the summation runs BACKWARDS-that is, starts with k-N, and quits with k-1. After S is computed, multiply it by 6, take the square of the result, and report the answer. Run this for N 10, 100, 1000, and 10000. Hmmmmm....

Answer 1

%17

n=[10 100 1000 10000];
for N=n
    S=0;
    for k=N:-1:1
        S=(1/(k*k))+S;
    end
    result=(6*S)^2;
    fprintf('Calculated result for N =%d: %f\n',N,result)
end
%%%%18
n=[10 100 1000 10000];
for N=n
    S=0;
    for k=N:-1:1
        if mod(k,2)==1
            S=(1/(k*k))+S;
        end
    end
    result=(6*S)^2;
    fprintf('Calculated result(odd numbers) for N =%d: %f\n',N,result)
end

Command Window >> reverseSum Calculated result for N -10: 86.464081 Calculated result for N -100: 96.234205 Calculated result for N-1000: 97.290751 Calculated result for N -10000: 97.397248 Calculated result (odd numbers) for N -10: 50.455304 Calculated result (odd numbers) for N =100: 54.349396 Calculated result (odd numbers) for N -1000: 54.748210 Calculated result (odd numbers) for N -10000 54.788172 x >