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irina [24]
3 years ago
7

(fog)(x) and (gof)(x) f(x)= 8/1-5x g(x)= 1/x Then find the domain for each

Mathematics
1 answer:
Paha777 [63]3 years ago
5 0
To find FoG ( or F of G) you put the equation of G in for the X of F

FoG = \frac{8x}{x-5}   The domain is All Except 5 since it makes the bottom 0

GoF = - \frac{5x}{8} + \frac{1}{8} The domain is -Infinity to Infinity


FoG ---  The picture --- You want the denominator the same for both of the numbers. By turning 1 into 1x/x it still stays 1 because the x's cancel out, but it can group with the 5.

Next you can multiply both sides (top and bottom) by x and get the final product.

GoF --- Multiply both sides by 5x+1 and get the final product 


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