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Redo Exercise 57 for arbitrary $b$ and $h$...

Question

Redo Exercise 57 for arbitrary $b$ and $h$

Redo Exercise 57 for arbitrary $b$ and $h$



Answers

In Exercises 63-70, find (a) $|A|$, (b) $|B|$, (c) $AB$, and (d) $|AB|$.

$A = \left[ \begin{array}{r} 5 & 4 \\ 3 & -1
\end{array} \right]$, $B = \left[ \begin{array}{r} 0 & 6 \\ 1 & -2
\end{array} \right]$

Okay, so we're looking for an expression for can a minus being And okay, so this is signed, Uh, a mind speak Divided by co sign A mind speak Sign of a mine is being his sign a co sign be wryness Sign as deep assign of a right bye This is cosign a co sign be now plus sign of a side of being And I want to divide the numerator and denominator by coastline, Acres and B show in the top because I'd be cancels and I'm left with tan, eh? Here the co sign any cancels So again I'm dividing by coastline Any co sign being Just stand be over here and the denominator If I divide this by Cho Simon because I'm b that's warning e about this by this is supposed to be minus my nest there and then sign I sign beat about it because today cause I'm bi this town today don't be

So for this problem here, we're being asked to find the limit of H as it approaches. Negative too, for for H plus seven, eh? So here you don't have any trick. We don't have a lot of the complex stuff that we might see later honor that we've already seen in Chapter two. So all we need to do here is plug in for H and then find R answer. And in this case, it's going to be in terms of a So if we look over here, we have negative, too. But she plugged in for a TSH, and that's going to result in negative eight A. That negative eight a is going to be added to seven A, which has no age. So we don't need to do anything to that. And our final answer is going to be negative.

So for this one, I'm going to start with the general first. So for solving for B, that means I want to get that be alone and move everything else to the other side. So I'm gonna start by multiplying both sides by two. Cause that gets rid of this 1/2 and that you So now I have to a is equal to B H. And finally, I'm gonna divide those sides by H because that's gonna cancel about the age on the top and bottom. Give me that B is equal to two a over h. So then, now that I have this equation, I'm just gonna plug in all the components so two times a cz 1 26 and then the 18 is gonna go on the bottom sense. That's h. So then I just have to put that into my calculator to two times 1 26 Divided by 18 is 14 with my face

I'm going to start with my B that in general first. So if I'm looking to solve four h, that means I am getting my age by itself and moving everything else to the other side. So I'm gonna start by multiplying two to both sides because that cancels out the 1/2 of the two. Because 1/2 times two is just one I have to A is equal to B h. I'm gonna divide both sides by B because that cancels out these bees and gets H by itself as to a over beat. Now that I have my equation, I'm just gonna plug in the components. So it tells me that a is 1 76 and tells me that my baby is 20 tube. So then, at this point, you just have to solve it. So two times 1 76 divided by 22 is going to give you six


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