问:公式推导
来自浙江省乐清市的网友魂魄成益的解答:
2ax=V2²-V1² 2a(x/2)=V(x/2)²-V1² 两式联立,有 V2²-V1²=2V²-2V1² 所以有V(x/2)=根号下((V1+V2)/2)
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