def test_sympyissue_11461():
try:
name = 'test'
tmp_file = TmpFileManager.tmp_file
p = plot(real_root((log(x / (x - 2))), 3), (x, 3, 4))
p.save(tmp_file('%s_11461' % name))
finally:
TmpFileManager.cleanup()
def test_sympyissue_11461():
try:
name = 'test'
tmp_file = TmpFileManager.tmp_file
p = plot(real_root((log(x/(x-2))), 3), (x, 3, 4))
p.save(tmp_file('%s_11461' % name))
del p
finally:
TmpFileManager.cleanup()
def test_real_root():
assert real_root(-8, 3) == -2
assert real_root(-16, 4) == root(-16, 4)
assert real_root(x, 2) == sqrt(x)
r = root(-7, 4)
assert real_root(r) == r
r1 = root(-1, 3)
r2 = r1**2
r3 = root(-1, 4)
assert real_root(r1 + r2 + r3) == -1 + r2 + r3
assert real_root(root(-2, 3)) == -root(2, 3)
assert real_root(-8., 3) == -2
n = Symbol('n')
g = real_root(x, n)
assert g.subs({x: -8, n: 3}) == -2
assert g.subs({x: 8, n: 3}) == 2
# give principle root if there is no real root -- if this is not desired
# then maybe a Root class is needed to raise an error instead
assert g.subs({x: I, n: 3}) == cbrt(I)
assert g.subs({x: -8, n: 2}) == sqrt(-8)
assert g.subs({x: I, n: 2}) == sqrt(I)