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The easy answer: If, say, B is the zero matrix, i.e.

then

Answer:
4/21
Step-by-step explanation:
I got the first probability and the second probabilty then multiplied them together.
For this case we have the following function:

We change the variables:

From here, we clear the value of y.

Then, we make the following change:

Finally, the inverse function is:

Answer:
The inverse of the given relation is:

Answer:
b
Step-by-step explanation: