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2017-10-04
源自：初識Python 3-4
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x1 = 1d = 3n = 100x100 = (99*3)+1s = 0for n in range(0,100):??? s = s+n*3+1print s
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x1 = 1
d = 3
n = 100
x100 = (n-1)*d+x1
s = (x1+x100)*50
print s
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2017-10-04
x1 = 1
d = 3
n = 100
x100 = (99*3)+1
s = 0
for n in range(0,100):
??? s = s+n*3+1
print s
2017-10-04
x1 = 1
d = 3
n = 100
x100 = (n-1)*d+x1
s = (x1+x100)*50
print s