question_answer

When the substances \[f(x)=({{x}^{2}}-1)|{{x}^{2}}-3x+2|\] and \[+\cos |x|\]are arranged is order of increasing boiling point, what is the correct order?

A) \[f(x+y)=f(x).f(y)\]         

B) \[f(15)=2,f'(0)=3,\]

C) \[x\sin (a+y)+\sin a\cos (a+y)=0,\]          

D) \[\frac{dy}{dx}\]