Given the vector A, return B in which all numbers in A are doubling. So for:
A = [ 1 5 8 ]
B = [ 1 1 5 5 8 8 ]
Back to basics 25 - Valid variable names
Is it an Armstrong number?
Calculate the derivative of a polynomial
02 - Vector Variables 2
Area of a triangle
Solving a quadratic equation
Divisors of an integer
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