Compute LOG(1+X) in natural log
need add abs to the test cases
Back and Forth Rows
Make a random, non-repeating vector.
Output a vector which is table of 9
Area of a circle
Transpose of matrix
Is it column vector?
Union of two set decreasing order
Rotate Matrix @180 degree
Delete 2nd and 5th column of Given 6*6 matrix
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