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2 years ago

I need to find the x pls help and show work

Mathematics

2 answers:

KIM [24]2 years ago

3 0

Answer:

X=63

Step-by-step explanation:

The quadrilateral above are similar and they have a ratio. To find the ratio divide a bigger side in the first shape by a corresponding smaller side in the other shape

36/4 = 9/1

The ratio is 9:1

When a side in the big shape is 9 the other shape is 1

Therefore x/7 =9

x = 7 * 9

=63

liraira [26]2 years ago

3 0

Answer:

Step-by-step explanation:

36 / 9 = 4

90 / 9 = 10

126 / 9 = 14

is the ratio 9:1

so 7 * 9 = 63

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Hey there!

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3 years ago

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1 year ago

Evaluate using integration by parts

PolarNik [594]

Rather than carrying out IBP several times, let's establish a more general result. Let

$I(n)=\displaystyle\int x^ne^x\,\mathrm dx$

One round of IBP, setting

$u=x^n\implies\mathrm du=nx^{n-1}\,\mathrm dx$

$\mathrm dv=e^x\,\mathrm dx\implies v=e^x$

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$\displaystyle I(n)=x^ne^x-n\int x^{n-1}e^x\,\mathrm dx$

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This is called a power-reduction formula. We could try solving for $I(n)$ explicitly, but no need. $n=5$ is small enough to just expand $I(5)$ as much as we need to.