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You can use this, or install it on your own from here: http://www.sagemath.org/
- Let Y be your year of birth, M the month, and D the day, create these variables.
- How much is Y divided by D? Associate this value with the b variable.
- Let r be the remainder of Y / M.
- What's the difference r - b?
- Is it true that the square root of the square of a number is the number itself?
- Use bool to convert to logical value
- Is it true for real numbers? Positive numbers? (assume)
- Prove (x − y)(x + y) = x2 − y2
- Prove ( − 1)2n = 1 where n is integer!
Sage functions, methods
- Is 2019 a prime? (use the is_prime() function)
- try to find a big prime number just by trial and error!
- Were you born on a prime day? (use the D variable!)
- Solve the equation Dx2 + Mx − br = 0 using the solve(f, variable) function!
- x needs to be a symbolic variable!
- f can be a function, formula or an equation.
- Solve the equation numerically! Use the find_root(f, min, max) function, where min and max defines an interval where Sage looks for the solution.
- this only works is you have one variable!
- Solve the above equation symbolically (make D, M, b, r symbolic variables, then use solve)!
- Differentiate the function .
- Integrate the previous function.
- Calculate the limit of
- Let f be the following function: f(x,y) = (x+2*y)^3
- Substitute 3 into x; then 4 into x and 2 into y. What's the result? ( use the subs() method of f)
- Expand f! (expand())
- Using the above, calculate the Taylor series of up until the 4th member. (you can differentiate and integrate a function f by f.diff(x))
Plotting with Sage (plot)
- Plot a cosine curve from 0 to 4*pi!
- Plot the (x − 2)2 + 3 polynomial from -2 to 4, color it green!
- Plot next to the previous one (using the show function) the function x3 − 3 * x + 6 in red!
- Plot a circle: cirlce((coordinates of the center), radius, optional). The "optional" can be: color, aspect_ratio=True so that the ratio of the x and y axis are kept, otherwise we might get an ellipse.