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janicemaxwell123
21.02.2020 •
Mathematics
Which of the following functions represent exponential decay?
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Ответ:
Option C:
is the function that represent exponential decay.
Explanation:
The exponential decay can be represented by
Option A:![$f(x)=3(1.7)^{x-2}$](/tpl/images/0518/9571/cde26.png)
From the function, we can see that
and ![b=1.7](/tpl/images/0518/9571/061d6.png)
Thus,
and ![b1](/tpl/images/0518/9571/01dd0.png)
Thus, the function
does not represent exponential decay.
Hence, Option A is not the correct answer.
Option B:![$f(x)=3(1.7)^{-2 x}$](/tpl/images/0518/9571/682cb.png)
From the function, we can see that
and ![b=1.7](/tpl/images/0518/9571/061d6.png)
Thus,
and ![b1](/tpl/images/0518/9571/01dd0.png)
Thus, the function
does not represent exponential decay.
Hence, Option B is not the correct answer.
Option C:![$f(x)=3^{5}\left(\frac{1}{3}\right)^{x}$](/tpl/images/0518/9571/919dd.png)
From the function, we can see that
and ![b=\frac{1}{3} =0.3333](/tpl/images/0518/9571/c85ca.png)
Thus,
and ![0](/tpl/images/0518/9571/73188.png)
Thus, the function
represent exponential decay.
Hence, Option C is the correct answer.
Option D:![$f(x)=3^{5}(2)^{-x}$](/tpl/images/0518/9571/b9e6f.png)
From the function, we can see that
and ![b=2](/tpl/images/0518/9571/38ae0.png)
Thus,
and ![b1](/tpl/images/0518/9571/01dd0.png)
Thus, the function
does not represent exponential decay.
Hence, Option D is not the correct answer.
Ответ:
Yes, because 42 squared + 56 squared = 70 squared.
Step-by-step explanation: