我对 Mathematica 很陌生。一切对我来说都是噩梦。我正在尝试计算产品
Product[((1 - 0.9 z^-1 Power[E, -I k (11 \[Pi])/50]) (1 -
0.9 z^-1 Power[E, I k (11 \[Pi])/50])), {k, 1, 4}]
但 Mathematica 在表格上回答
(1 - (0.6934619184982104 + 0.5736815907738206*I)/z)*
(1 - (0.6934619184982104 - 0.5736815907738206*I)/z)*
(1 - (0.16864318312715226 + 0.8840585256558198*I)/z)*
(1 - (0.16864318312715226 - 0.8840585256558198*I)/z)*
(1 + (0.4335783066915439 - 0.7886760120394771*I)/z)*
(1 + (0.4335783066915439 + 0.7886760120394771*I)/z)*
(1 + (0.8367988372994263 - 0.3313120974162103*I)/z)*
(1 + (0.8367988372994263 + 0.3313120974162103*I)/z)
而我想保留精确的指数形式,而不是用数值计算表达式。
谢谢