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Ksju [112]
3 years ago
10

Suppose that a, b \in \mathbb{Z}a,b∈Z, not both 00, and let d=\gcd(a, b)d=gcd(a,b). Bezout's theorem states that dd can be writt

en as a linear combination of aa and bb, that is, there exist integers m, n \in \mathbb{Z}m,n∈Z such that d = am + bnd=am+bn. Prove that, on the other hand, any linear combination of aa and bb is divisible by dd. That is, suppose that t = ax + byt=ax+by for some integers x, y \in \mathbb{Z}x,y∈Z. Prove that d \, | \, td∣t.
Mathematics
1 answer:
lara [203]3 years ago
3 0

Answer:

Step-by-step explanation:

Recall that we say that d | a if there exists an integer k for which a = dk. So, let d = gcd(a,b) and let x, y be integers. Let t = ax+by.

We know that d | a, d | b so there exists integers k,m such that a = kd and b = md. Then,

t = ax+by = (kd)x+(md)y = d(kx+my). Recall that since k,  x, m, y are integers, then (kx+my) is also an integer. This proves that d | t.

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Answer:

Yes, There is significant difference.

Step-by-step explanation:

Null Hypothesis , H0 : Mean income = 15000

Alternate Hypothesis , H1 : Mean income  ≠  15000

t = (x - u) / ( s / √n)

x = sample mean = 14500 here, u = population mean = 15000 here ,             s = standard deviation =  975 here  , n = sample size

t = (14500 - 15000) / (975 / √169)

-500 / 75 = - 6.66

As  calculated t value in absolute terms is > 1.96 , ie tabulated value at 95% significance level (two sided). So we reject the null hypothesis in favor of alternate hypothesis. Hence, we state that 'Mean Income ≠  15000'

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<h2>Hello!</h2>

The answer is:

The area of this figure is 946 square inches.

<h2>Why?</h2>

We can see that the figure is composed by two rectangles with diferrent dimensions, so, to calculate the area of the entire figure.

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For the first rectangle, we have:

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The area will be:

Area=Base*Height=7in*28in=196in^{2}

For the second rectangle, we have:

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Now, calculating the area of the entire figure, we have:

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