Estimate a using inverse matrix calculation. This is principle of linear regression.
As a friendly reminder, we can see the test suite, so it makes the problem more challenging if the solution is not explicitly in the test suite.
The Test Suite needs to allow for floating-point errors in all test cases, as demonstrated in Solution 1575603. (Refer to Problem 44690.) Also, there should be at least four test cases for every problem.
Find common elements in matrix rows
Min of a Matrix
Side of an equilateral triangle
Is this triangle right-angled?
Determine the square root
Weighted moving average
Find x in provided equation!
Calculate numerical integration.
Replace 0 to NaN!
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