求计算和解析.

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求计算和解析.
xN0_T}؆ Bv&@P!1b10 UbDg韍W -tCw~9_ff:}GRFyUg㪯|+w1PY+<2:O.-*]ˬBݗNLU 8%P1Aa-He\B\@*T0M NqIY|X4ijМ@$tP=SnC*.\6On'EQ6?}Q;Gxe7.Pe};Ko^

求计算和解析.
求计算和解析.
 

求计算和解析.
原式=[0.1×0.3×0.9×(1+2立方+3立方)]/[0.1×0.2×0.4×(1+2立方+3立方)]
=0.1×0.3×0.9/[0.1×0.2×0.4]
=27/8