I would say that, while your notation of
isn't quite kosher, the idea is correct. I would write it as
In any case, your answer is correct. The answer of -4 is clearly wrong.
I'm a little confused with a problem (very!) early on in the 5th edition of Stroud's Engineering Mathematics.
F1 (pg. 69), #14c
Write each of the following as a number raised to a power:
The answer given is:
Naively, I thought:
Although I guess would be appropriate according to the wording of the question.
Clearly I'm missing something fundamental, can someone please point me in the right direction?