# List of functions used for infinitesimal approaching.
# An item in this list will be picked randomly at each exercise.
# Structure of item: multi-line.
# line 1 is function description.
# line 2 is x_0.
# lines 3 to 5 is alternative values for a2, a3, a4, a5.
# The rest is values for parameters c1, c2, etc.
# Different items are separated by lines starting with `:'.

:a1*cos(a3*x)+a2*sin(c3*x)+c1*x+c2
 0
 o
 -9,-8,-7,-6,-5,-4,-3,-2,2,3,4,5,6,7,8,9
 -9,-8,-7,-6,-5,-4,-3,-2,-1,1,2,3,4,5,6,7,8,9
 -9,-8,-7,-6,-5,-4,-3,-2,2,3,4,5,6,7,8,9
:(a1*cos(x)+a3*x^4+a2*x^2)*x+c1*sin(x)
 0
 1+2*o
 -9,-8,-7,-6,-5,-4,-3,-2,2,3,4,5,6,7,8,9
