f(x)= f(2) +f '(2) (x-2) +f ''(2)/2!(x-2)² +.+ f(2)n阶导 /n!(x-2)^n + f(ζ)n+1阶导 /n!(x-2)^(n+1）lnx = ln2 +1/2(x-2) - 1/8(x-2)² + .+ (-1)(-2)...×(-n+1)/(n!×2^n) (x-2)^n + (-1)(-2)...×(-...