The following expansion can be used to find the difficult limits easily. We recommend you to remember them.
1)ex=x1!+x22!+x33!+......
2)ln(1+x)=x−x22+x33....., -1 < x ≥ 1
3)sin x=x−x33!+x55!−x77!.....
4)cos x=1−x22!+x44!−x66!......
5)tan x=x+x33!+2x515!......
6)ax=1+(lna)x+(lna)2x22!.......
We will be using these expansions to solve problems in this topic.
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