METHODS OF LIMIT-CALCULATING PRESENTED BY GUO CHENG GUANG AND GUO CHENGX...

We can use substition to the limit towards one point whenever the function is continuous at that point, that's one of the definition of continuity.If the function is not continuous at the point we can't get the limit by direct substitution.

Find limits of functions at specific points just easily by directly plugging the point into the function.

METHODS OF LIMIT-CALCULATING PRESENTED BY GUO CHENG GUANG AND GUO CHENGXI(1-02，S/N: 71) Presented By Guo Cheng Guang (aged 11) and Guo Chengxi (aged 8) in English. Lessons In Mathematics and Science (Physics, Chemistry and Biology) From Primary to University Presented By Guo Cheng Guang and Guo Chengxi In English. Your comment or suggestion is very much appreciated. https://www.youtube.com/channel/UC2dG5T9SJkUFTy-h0KbVbkw