已知在计算电阻的公式1/f=1/u+1/v(f不等于u),已知u,f,求 v
问题描述:
已知在计算电阻的公式1/f=1/u+1/v(f不等于u),已知u,f,求 v
答
1/v=1/f-1/u=(u-f)/uf
v=uf/(u-f).
答
1/v=1/f-1/u=(u-f)/uf
v=uf/(u-f)
答
fu/(u-f)
答
把数据带进去不就行了?
答
1/f-1/u=1/v
两边同时乘以f*u
u-f=uf/v
v=uf/(u-f)