秀吉の御褒美

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f:id:ti-nspire:20181128080600p:plain:w500
.tns

sum(seq(2^(n),n,0,99))
sum(2^(seq(n,n,0,99)))
∑(2^(n),n,0,99)

Σはsumseqで入力できる。
f:id:ti-nspire:20181128173456p:plain:w500
.py

import numpy as np
print(sum([2**i for i in range(100)]))
print(np.sum(2**np.arange(100, dtype=np.float64)))

f:id:ti-nspire:20181128075343p:plain:w500
wolfram:

Total[Table[2^i,{i,0,99}]]
Total[2^Table[i,{i,0,99}]]
Sum[2^i,{i,0,99}]

f:id:ti-nspire:20181129071145p:plain:w500