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anonymous
 4 years ago
If f(x) = 3x + 5, then what is f–1(x) ?
anonymous
 4 years ago
If f(x) = 3x + 5, then what is f–1(x) ?

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amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1y = 3x+5, solve for x

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1or, since the inverse of (x,y) is (y,x) we can swap our a and y positions: x = 3y+5; and solve for "y" to get f1(x)

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1our x and y positions ... i need a few more keys to keep track of

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0let y=f(x).. then y= 3x+5; => (y5)/3=x; (eq.1) => as y=f(x); => x=f1(y); so from eq.1 (y5)/3=f1(y); (eq.2) => replace 'y' with 'x' in eq.2 then (x5)/3= f1(x) ans. thus f1(x)=(x5)/3 this is generalized one...u need to knw the domain and interval to restrict the limit.

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.151(3) ..... not quite x = 3y+5 5 5  x5 = 3y and then finish off by dividing off that 3
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