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In which of the following functions is R...

In which of the following functions is Rolles theorem applicable? `(a)f(x)={x ,0lt=x<1 ;0,x=1on[0,1]` `(b)f(x)={(sinx)/x ,-pilt=x<0 ;0,x=0on[-pi,0)` `(c)f(x)=(x^2-x-6)/(x-1)on[-2,3]` `(d)f(x)={(x^3-2x^2-5x+6)/(x-1)ifx!=1,-6ifx=1on[-2,3]`

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