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clear
//
//this is a derivation by substitution problem
//al1=al0/(1+al0*t1)
//al2=al0/(1+al0*t2)
//where t1 and t2 are different temperatures al0,al1 and al2 are temperature coefficients
//substitute al0 in al2
//on deriving and solving for al2 we get,
printf("\n al2=al1/(1+al1*(t1-t2))")