square root of an expression as a power series
formal power series, polynomial, or any function that is acceptable for power series package
The function powsqrt(p) returns the formal power series that is the square root of p.
The power series of p must have a nonzero first term (p⁡0≠0) for its logarithm to be well-defined.
The command with(powseries,powsqrt) allows the use of the abbreviated form of this command.
s ≔ powsqrt⁡x2+x+1:
t ≔ powsqrt⁡ⅇx:
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