Ответ:
десь 23,3
Объяснение:
r1,2=(r1*r2)/(r1+r2)
r1,2,3=(r1,2*r3)/(r1,2+r3)
r1,2,3,4,5=r1,2,3+(r4+r5)
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Ответ:
десь 23,3
Объяснение:
r1,2=(r1*r2)/(r1+r2)
r1,2,3=(r1,2*r3)/(r1,2+r3)
r1,2,3,4,5=r1,2,3+(r4+r5)