Answers

2014-05-16T10:45:01+05:30
Let ax+b=f(x)
derivative of f(x)=a=[a(1)+0=a]
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2014-05-16T16:42:50+05:30
F(x) = ax + b
f(0) = b
f '(x) =  lim    {f(x) - f(0)} / x
          x---->0
f '(x) = lim     (ax + b - b) / x
          x---->0
f '(x)  = lim      a
           x---->0
f '(x)  = a
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