Problem 2870. Print the largest eigenvalue of A(500)

Write a function that prints the largest eigenvalue of A(500), without any extraneous output.

For a positive integer n, let A(n) be the n×n matrix with entries aij = 1/(i + j − 1). The eigenvalues of A(n) are all real numbers.

(Hint: The M-file may take a while to run if you use a loop within a loop to define A. Try to avoid this!)

Solve

Last solution submitted on Sep 23, 2018

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Sean de Wolski on 21 Jan 2015

"Correct" answer does not have enough precision.

Guillaume on 22 Jan 2015

You need more test cases, with different values of n. Otherwise it's trivial to defeat the test suite.

Celestino on 22 Jan 2015

I agree with Sean

Paul on 22 Jan 2015

I agree with Sean and Guillaume. I had to use "y = round(y*10000)/10000;" to get my code to pass the test.

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