Let(adsbygoogle = window.adsbygoogle || []).push({}); be a v.v.f -with the first and second derivativesr(t)andr'. Determine formula forr''

-in terms ofd/dt [r.(r' x r'')]:r

How do we approach this one?

maybe:

??d/dt [r.(r' x r'')] = d/dt [r.r' x r.r''] = ((r'.r' + r.r'') x r'.r'') + (r.r' x (r'.r'' + r.r'''))

...and then what?

Is anyone able to give me a starting point -- or starting direction? -- thanks heaps

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# Determine a formula for (RE: vector valued functions)

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