How do you solve the system #x^2+y^2+8x+7=0# and #x^2+y^2+4x+4y-5=0# and #x^2+y^2=1#?
There are no points where all three equations intersect.
We have the following equations:
Now let's solve E1:
Now let's solve E2:
And now let's check our work by substituting into E3:
So there is no solution in this system that satisfies all three equations.
We can see this in the following graphs:
graph{x^2+y^2+8x+7=0 [-20, 20, -10, 10]}
graph{x^2+y^2+4x+4y-5=0 [-20, 20, -10, 10]}
graph{x^2+y^2=1 [-20, 20, -10, 10]}
As you can see, there are no points where all three graphs intersect.
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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
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