#!/usr/bin/env python3fromsympyimport symbols, sin, sqrt, pi
fromsympy.plottingimport plot3d
print('5.')
x, y = symbols('x, y')
fs = [x **2+ y **2,
x / sqrt(x **2+ y **2),
sin(x * y)]
gs = [6* x +8* y -25,
(16* x +12* y +75) /125,
(2* pi - pi * x - y) /2]
for i, (f, g) inenumerate(zip(fs, gs)):
c =chr(ord("a") + i)
print(f'({c})')
p = plot3d(f, g,
(x, -5, 5),
(y, -5, 5),
show=False)
p.save(f'sample5_{c}.png')
p.show()
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