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statuscvo [17]
3 years ago
9

(x - 2) + (y - 9) = 4 center and the radius of the circle

Mathematics
1 answer:
storchak [24]3 years ago
7 0

Answer:

The center is (2, 9) and the radius is 2.

Step-by-step explanation:

The general equation for a circle is (x - h) + (y - k) = r^2

(h, k) is the center and r^2 is the radius squared. So, in this case (h, k) is (2, 9) and r^2 is 4 so r = 2.

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Step-by-step explanation:

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Consider the function f given by f(x)=x*(e^(-x^2)) for all real numbers x.
NISA [10]

Answer:

\frac{\sqrt{\pi}}{4}

Step-by-step explanation:

You are going to integrate the following function:

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furthermore, you know that:

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lets call to this integral, the integral Io.

for a general form of I you have In:

I_n=\int_0^{\infty}x^ne^{-ax^2}dx

furthermore you use the fact that:

I_n=-\frac{\partial I_{n-2}}{\partial a}

by using this last expression in an iterative way you obtain the following:

\int_0^{\infty}x^{2s}e^{-ax^2}dx=\frac{(2s-1)!!}{2^{s+1}a^s}\sqrt{\frac{\pi}{a}} (2)

with n=2s a even number

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\int_0^{\infty}x^2e^{-x^2}dx=\frac{(2(1)-1)!}{2^{1+1}(1^1)}\sqrt{\pi}=\frac{\sqrt{\pi}}{4}

5 0
3 years ago
Read 2 more answers
10 more than 405. 4 hhundred 0 tens 5 ones
vova2212 [387]

(4 hundred + 0 tens + 5 ones) + (1 ten) = 4 hundred + 1 ten + 5 ones

... = 415

4 0
3 years ago
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