Alan

This is \(\frac{6.4\times10^{12}}{1.6\times10^3}=4\times10^{12-3}\rightarrow4\times10^9\)

These raise a number to a power. So for example, entering 2 x³ = results in 8,

entering 2 x² = results in 4, and entering 2 x^y 5 = results in 32

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Use the "2nd" key, top left.

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The answer is unique because:

r`(x) = f`(g(h(x)))*g`(h(x))*h`(x)

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Hmm!

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The velocity is given by v = -w*A*sin(wt+sigma)

The velocity is zero when wt + sigma = n*pi     or:   t = (n*pi - sigma)/w

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Just type abs(x).  For example:  abs(-5) results in 5

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Let y = ln(4t)     dy/dt = 1/t 

Then:   g = 2ln(4y) or g = 2ln(4) + 2ln(y)

dg/dy = 2/y

dg/dt = dg/dy*dy/dt → (2/y)*(1/t) → 2/(t*ln(4t))

Note:  I've assumed the equation is meant to be: e^(x) - 12*e^(-x)  - 1 = 0,  which is different from the way the original is written.

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"If there is another way to solve this I would like to know, please"

Here is another approach:

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