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g100num [7]
3 years ago
7

%20" id="TexFormula1" title=" ({ {x}^{2} - 4})^{5} ( {4x - 5})^{4} " alt=" ({ {x}^{2} - 4})^{5} ( {4x - 5})^{4} " align="absmiddle" class="latex-formula">
can someone help me differentiate? ​
Mathematics
1 answer:
Makovka662 [10]3 years ago
7 0

Let u=x^2-4 and v=4x-5. By the product rule,

\dfrac{\mathrm d(u^5v^4)}{\mathrm dx}=\dfrac{\mathrm d(u^5)}{\mathrm dx}v^4+u^5\dfrac{\mathrm d(v^4)}{\mathrm dx}

By the power rule, we have (u^5)'=5u^4 and (v^4)'=4v^3, but u,v are functions of x, so we also need to apply the chain rule:

\dfrac{\mathrm d(u^5)}{\mathrm dx}=5u^4\dfrac{\mathrm du}{\mathrm dx}

\dfrac{\mathrm d(v^4)}{\mathrm dx}=4v^3\dfrac{\mathrm dv}{\mathrm dx}

and we have

\dfrac{\mathrm du}{\mathrm dx}=2x

\dfrac{\mathrm dv}{\mathrm dx}=4

So we end up with

\dfrac{\mathrm d(u^5v^4)}{\mathrm dx}=10xu^4v^4+16u^5v^3

Replace u,v to get everything in terms of x:

\dfrac{\mathrm d((x^2-4)^5(4x-5)^4)}{\mathrm dx}=10x(x^2-4)^4(4x-5)^4+16(x^2-4)^5(4x-5)^3

We can simplify this by factoring:

10x(x^2-4)^4(4x-5)^4+16(x^2-4)^5(4x-5)^3=2(x^2-4)^4(4x-5)^3\bigg(5x(4x-5)+8(x^2-4)\bigg)

=2(x^2-4)^4(4x-5)^3(28x^2-57)

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nirvana33 [79]
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R = 9L ( the number of right handed kids is equal to having 9*number of left handed kids) 
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Hope this helped!
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Alecsey [184]

Answer:

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For min/inch = 1.0908 min/inch

Step-by-step explanation:

The snail in the race traveled 11/6 inches in 2 minutes.

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The number of minutes per inch is equal to = 1/(inch per min)

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Minutes per inch is gotten by taking the inverse of inch/min or dividing the number of minutes by number of inches

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