Symbolab Blog: Advanced Math Solutio…
http://blog.symbolab.com/2015/02/advanced-math-solutions-limits.html
Substitution method: Plug in the value to which x is approaching. Inner function method: Given a function, f (g (x)), set the inner function equal to g (x) and find the limit, b, as x approaches a. Replace g (x) in f (g (x)) with u to get f (u). Using b, find the limit, L, of f (u) as u approaches b. The limit of f (g (x)) as x approaches a is equal to L.
Substitution method: Plug in the value to which x is approaching.
Inner function method: Given a function, f (g (x)), set the inner function equal to g (x) and find the limit, b, as x approaches a. Replace g (x) in f (g (x)) with u to get f (u). Using b, find the limit, L, of f (u) as u approaches b. The limit of f (g (x)) as x approaches a is equal to L.
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