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Fransha007

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I like tennis, and reading. I am also a pc gamer, currently playing lol and nfs, and sometimes as little starcraft 2. :)

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    I know that to find the maximum value I need to find the derivative of the function and then set it to zero. And i got:

    f'(x)=5^x(ln5)-5x^4

    0=5^x(ln5)-5x^4

    x^4=5^(x-1)(ln5)

    And this is where i got stuck, i cannot solve the above equation. And i know there is an answer since using guess and check i was about to come close to the answer.

    I asked my teacher about this first, according to him, it's unsolveable using algebra. and i do not need to know about it at grade 12 high school(but i still wish to know). So basically i'm asking if you can show me how to solve this, or tell me what i would need to know to be able to solve this.

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    15 AnswersMathematics1 decade ago
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