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DERIV.EKA
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1991-07-01
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270b
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; Demo of symbolic derivatives.
; x is deliberately left undefined, so Mercury will not be able to simplify
; to a real value.
f(x) := EXP(x SIN(x))
a = deriv(f(x),x)
; numerical derivatives
b = deriv(f(y),y)
c = (f(y + eps) - f(y)) / eps
eps = 1e-10
y = 1