该物理问题关注的是并联电阻，即使得并联电阻总阻值最小的电阻组合。题目描述了并联电阻的计算公式，并给出了一种寻找最小电阻的方法。输入包含多个测试案例，每个案例给出电阻数量，要求输出最小阻力的最简分数形式。解决方案中提到，连续素数之积可能是满足条件的最小无平方因子数。
In this physics problem, what we are concerned about are only resistors. If you are poor at physics, do not worry, since solving this problem does not require you to have advanced abilities in physics.
Resistors are said to be connected together in parallel when both of their terminals are respectively connected to each terminal of the other resistors.
We have the following parallel resistor equation for k resistors with resistances R1, R2, ..., Rk in parallel and their combined resistance R:
Now you have n resistors, the i-th of which has a resistance of ri ohms with t
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