Let g (x) = 1 x , h (x) = x 3 , which is f (x) = (1 x 3) 1 3 in the problem. F mark: The suffix ends with f, it does not have core display and cannot be overclocked, such as core i7 11700f. In short, k means that overclocking is possible, and f means that there is no core display, so the k mark is the highest, the f mark is the lowest, and the no mark and kf mark are in the middle. Unit conversion 1 farad (f) = 1×10^6 microfarad (μf)=1000000 microfarad (μf) 1 microfarad (μf)=1x10^3 nanofarad (nf) 1 microfarad (μf)= 1×10^6 picofarad (pf)=1000000 picofarad (pf) The farad is a unit derived from the International System of Units. 1f=1 c/v=1.
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We often see statements similar to: function f (x)=x^2+1 in textbooks. This is actually not rigorous, because f (x) is a function value, and it can only represent the function value. The left and right sides can be equal. You cannot say f=x^2+1, two different things. Zhihu, a high-quality Q&A community on the Chinese Internet and an original content platform where creators gather, was officially launched in January 2011 with the brand mission of "allowing people to better share knowledge, experience and insights, and find their own answers." Zhihu relies on seriousness and professionalism. A simple explanation is given below and some common functions satisfying the property f (f (x)) = x are introduced.
