be f(x)=ln^2x-4^4x Defined for any Positive x.
how many of the sentences are correct?

1)the sum of the sqrt Equation f(x)=0 is e+1
2) the Derivative are become zero in the point: x=1/sqrt"e"
3) limf(x)=Infinity when x-->0+
4)f'(-1)=0

about 3 I think is not correct. But I need your help.
thanks.

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Originally Posted by pop000

be Defined for any Positive x.
how many of the sentences are correct?

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Do you mean the function above?

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1)the sum of the sqrt Equation f(x)=0 is e+1

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sum of sqrt equation?

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2) the Derivative are become zero in the point:

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Assuming the f(x) I have above is correct, . Plug in and see if you get 0 as a result.

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3)

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This is obviously true. You can see it from the graph as well.

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4)f'(-1)=0

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If you plug x=-1 into f(x), do you get 0?

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about 3 i think is not correct.

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Assuming I interpreted f(x) correctly, you apear to be correct.

Which one IS correct?



thanks.

no the function I mean is almost like you showed the part one as you showed with ln^2(x) is correct but the Part Two is not correct is need to be ln^4(x).

thank you.

no the function I mean is almost like you showed the part one as you showed with ln^2(x) is correct but the Part Two is not correct is need to be ln^4(x).

thank you.

Then why did you write 4 instead of ln? You have not fixed the typo.

Yes sorry is was my mistake.

That's OK. It will not allow you to edit now. That should be changed in the event of cases like this.