2 years ago

2/(x+1)-2/(x+1)+4/(x^2+1)

Mathematics

1 answer:

Scilla [17]2 years ago

4 0

4x^2+4 should be your answer.

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2 years ago

What is the ratio of the intensities of an earthquake PP wave passing through the Earth and detected at two points 19 kmkm and 4

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The intensity I() of an earthquake wave is given by:

$I = \frac{P}{4\pi d^{2}}$

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Hence, the ratio of the intensities of an earthquake wave passing through the Earth and detected at two points 19 km and 46 km from the source is:

$\frac{I_{1}}{I_{2}} = \frac{P/4\pi d_{1}^{2}}{P/4\pi d_{2}^{2}}$

where I₁ = P/4πd₁², d₁=19 km, I₁ = P/4πd₂² and d₂=46 km

$\frac{I_{1}}{I_{2}} = \frac{d_{2}^{2}}{d_{1}^{2}}$

$\frac{I_{1}}{I_{2}} = \frac{46 km^{2}}{19 km^{2}}$

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Therefore, the ratio of the intensities is roughly 6:1.

I hope it helps you!

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2 years ago

2/(x+1)-2/(x+1)+4/(x^2+1)​

2/(x+1)-2/(x+1)+4/(x^2+1)