A resistor is to have a constant resistance of 30(ohm), independent of temperature. For this, an aluminium resistor with resistance R1 at 0(celcius) is used in series with a carbon resistor with resistance R2 at 0(celcius). Evaluate R1 and R2, given that [tex]\alpha 1[/tex] is 3.9 x 10^-3 for aluminium and [tex]\alpha 2[/tex] is -0.5 x 10^-3 for carbon. Can anyone give me some clues to solve this question? Thanks in advance.