https://s0.wp.com/latex.php?latex=%5Cdisplaystyle+f%28x%29%3Df%28a%29%2B%28x-a%29%5Cfrac%7Bf%5E%7B%5Cprime%7D%28a%29%7D%7B1%21%7D%2B%28x-a%29%5E%7B2%7D%5Cfrac%7Bf%5E%7B%5Cprime%5Cprime%7D%28a%29%7D%7B2%21%7D%2B%5Ccdots%2B%28x-a%29%5E%7Bn-1%7D%5Cfrac%7Bf%5E%7B%28n-1%29%7D%28a%29%7D%7B%28n-1%29%21%7D%2B%28x-a%29%5E%7Bn%7D%5Cfrac%7Bf%5E%7B%28n%29%7D%28%5Cxi%29%7D%7Bn%21%7D&bg=ffffff&fg=000000&s=0