Two resistance `R_(1)` and `R_(2)` are made of different material. The temperature coefficient of the material of `R_(1)` is `alpha` and of the material of `R_(2)` is `-beta`. Then resistance of the series combination of `R_(1)` and `R_(2)` will not change with temperature, if `R_(1)//R_(2)` will not change with temperature if `R_(1)//R_(2)` equalsA. `(alpha)/(beta)`B. `(alpha+beta)/(alpha-beta)`C. `(alpha^(2)+beta^(2))/(alphabeta)`D. `(beta)/(alpha)`

Two resistance `R_(1)` and `R_(2)` are made of different material. The

1.	Two resistance `R_(1)` and `R_(2)` are made of different material. The temperature coefficient of the material of `R_(1)` is `alpha` and of the material of `R_(2)` is `-beta`. Then resistance of the series combination of `R_(1)` and `R_(2)` will not change with temperature, if `R_(1)//R_(2)` will not change with temperature if `R_(1)//R_(2)` equalsA. `(alpha)/(beta)`B. `(alpha+beta)/(alpha-beta)`C. `(alpha^(2)+beta^(2))/(alphabeta)`D. `(beta)/(alpha)`
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