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AdiGirlBrainly
02.10.2020 •
Mathematics
Please help it’s due tonight whoever answers will get brainliest!!
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Ответ:
Step-by-step explanation:
(5^2/4)^4 = (5^8/4^4)
answer is D
Ответ:
Option B.
Step-by-step explanation:
Option A.
f(x) =![(0.5)^{x}](/tpl/images/0683/2549/77392.png)
Derivative of the given function,
f'(x) =![\frac{d}{dx}(0.5)^x](/tpl/images/0683/2549/d1e76.png)
=![(0.5)^x[\text{ln}(0.5)]](/tpl/images/0683/2549/c8a85.png)
=![-(0.693)(0.5)^{x}](/tpl/images/0683/2549/9534b.png)
Since derivative of the function is negative, the given function is decreasing.
Option B. f(x) =![5^x](/tpl/images/0683/2549/0029b.png)
f'(x) =![\frac{d}{dx}(5)^x](/tpl/images/0683/2549/95ada.png)
=![(5)^x[\text{ln}(5)]](/tpl/images/0683/2549/0b481.png)
=![1.609(5)^x](/tpl/images/0683/2549/e0b10.png)
Since derivative is positive, given function is increasing.
Option C. f(x) =![(\frac{1}{5})^x](/tpl/images/0683/2549/8091a.png)
f'(x) =![\frac{d}{dx}(\frac{1}{5})^x](/tpl/images/0683/2549/91664.png)
=![\frac{d}{dx}(5)^{(-x)}](/tpl/images/0683/2549/58b4d.png)
=![-5^{-x}.\text{ln}(5)](/tpl/images/0683/2549/e53a4.png)
Since derivative is negative, given function is decreasing.
Option D. f(x) =![(\frac{1}{15})^x](/tpl/images/0683/2549/bb9d2.png)
f'(x) =![-15^{-x}[\text{ln}(15)]](/tpl/images/0683/2549/6fe13.png)
=![-2.708(15)^{-x}](/tpl/images/0683/2549/e9e89.png)
Since derivative is negative, given function is decreasing.
Option (B) is the answer.