np.lagroots() method is used to differentiate a Laguerre series.
np.lagder(c, m=1, scl=1, axis=0)
c :[array_like] 1-D arrays of Laguerre series coefficients ordered from low to high.
m :[int, optional] Number of derivatives taken, must be non-negative.Default is 1.
scl :[scalar, optional] Each differentiation is multiplied by scl .Default is 1.
axis :[ int, optional] Axis over which the derivative is taken.Default is 0.
Return : [ndarray] Laguerre series of the derivative.
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[ 6.5 3.5 1.25]
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