MHB How do you solve for an exponent that is pi and a cube root?

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To solve for an exponent that is pi and a cube root, using a calculator is often necessary, especially for non-perfect cube roots. The identity a^b = e^(b ln a) is useful for handling such calculations. This allows for the transformation of the expression into a form that can be computed with known values. Specific examples include expressions like e^(π ln 2) and e^(1/3 ln 73). Ultimately, using a calculator simplifies the process of finding these values.
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How do you solve when an exponent is pi?

And a cube root.

Thanks, sorry I'm slow.View attachment 3285
 

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OMGMathPLS said:
How do you solve when an exponent is pi?

And a cube root.

Thanks, sorry I'm slow.View attachment 3285
Once in a while you will have a "perfect" cube root, ala the cube root of 27, but in general you have to use a calculator.

-Dan
 
OMGMathPLS said:
How do you solve when an exponent is pi?

And a cube root.

Thanks, sorry I'm slow.View attachment 3285

In general for a > 0 the following identity holds...

$\displaystyle a^{b} = e^{b\ \ln a}\ (1) $

... so that the six numbers are $\displaystyle e^{\ln 4.2},\ e^{\pi\ \ln 2},\ e^{\frac{1}{2} \ln 15},\ e^{2.5\ \ln 2},\ e^{\frac{1}{3}\ \ln 73},\ e^{3\ \ln \pi}$, and at this point You have to work on the exponents...

Kind regards

$\chi$ $\sigma$
 
Thanks. I will put it in a calculator.
 
Here is a little puzzle from the book 100 Geometric Games by Pierre Berloquin. The side of a small square is one meter long and the side of a larger square one and a half meters long. One vertex of the large square is at the center of the small square. The side of the large square cuts two sides of the small square into one- third parts and two-thirds parts. What is the area where the squares overlap?

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