Evaluate the limit, if it exists. (If an answer does not exist, enter DNE.)lim h→0 (3 + h)3 − 27h
Question
Evaluate the limit, if it exists. (If an answer does not exist, enter DNE.)
Solution
To solve this limit, we can use the limit properties and the binomial theorem.
The binomial theorem states that (a + b)^n = a^n + n*a^(n-1)*b + ... + b^n.
So, (3 + h)^3 = 3^3 + 3^23h + 33^2*h^2 + h^3 = 27 + 27h + 27h^2 + h^3.
Therefore, the expression (3 + h)^3 - 27h becomes 27 + 27h + 27h^2 + h^3 - 27h = 27 + 27h^2 + h^3.
Now, we can take the limit as h approaches 0: lim h→0 (27 + 27h^2 + h^3).
Since h is approaching 0, h^2 and h^3 will also approach 0. Therefore, the limit is 27.
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