Find, from first principle, the derivative of: log(ax+b)
My Attempt: f(x)=log(ax+b)
f(x+Δx)=log(ax+aΔx+b)
Now, f′(x)=limΔx→0f(x+Δx)−f(x)Δx
=limΔx→0log(ax+aΔx+b)−log(ax+b)Δx
=limΔx→0log(ax+aΔx+bax+b)Δx
I have injection f:A→B and I want to get bijection. Can I just resting codomain to f(A)? I know that every function i...
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