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  3. If the function f(x)=x+2, and the function g(x)=3x, what is the function g{f(x)}

If the function f(x)=x+2, and the function g(x)=3x, what is the function g{f(x)}

游客2024-01-12  56
问题 If the function f(x)=x+2, and the function g(x)=3x, what is the function g{f(x)}?
选项
答案  The problem gives g(x)=3x and f(x)=x+2 and asks for g{f(x)}. The function g{f(x)} means that all of the x values in g(x) are replaced with f(x), as follows:
   g{f(x)}=3{f(x)}
   g{f(x)}=3(x+2)
   g{f(x)}=3x+6
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