Two wires are of same length and same ar...

Two wires are of same length and same area of cross-section. If first wire has resistivity `rho_1` and temperature coefficient of resistance `alpha_1` but second wire has resistivity `rho_2` and temperature coefficient of resistance `alpha_2`. Their series equivalent resistance is independent of small temperature changes. Then

`alpha_1+alpha_2=0`

`rho_1alpha_1=rho_2alpha_2`

`rho_1alpha_1+rho_2alpha_2=0`

`rho_1alpha_2+rho_2alpha_1=0`

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