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Numerical Ability
Quadratic Equations
If f(x) = 7 x +12, what is f-1(x) (the inverse function)?
Read Solution (Total 9)
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- let y = f(x) = 7x + 12
=> 7x = y-12
=> x = (y-12)/7
=> f-1(x) = (x-12)/7 - 10 years agoHelpfull: Yes(24) No(1)
- Inverse is (x-12)/7
- 10 years agoHelpfull: Yes(1) No(0)
- f(x)=7x+12
let y=7x+12
so x=y-12/7
So the req inverse function is f^-1(x)=x-12/7 - 10 years agoHelpfull: Yes(1) No(0)
- y=7x+12
x=(y-12)/7
f-1(x)=x-12/7 - 10 years agoHelpfull: Yes(0) No(0)
- f(x)=7x+12
y=7x+12
x=y-12/7
inverse f(x)=(x-12)/7 - 10 years agoHelpfull: Yes(0) No(0)
- a=7x+12
find the value of x
x=a-12/7
change the constants
ans=x-12/7 - 10 years agoHelpfull: Yes(0) No(0)
- f inverse =(x=X-12/7)
- 10 years agoHelpfull: Yes(0) No(1)
- f inv(x)=(x-12)/7
- 10 years agoHelpfull: Yes(0) No(0)
- suppose y=f(x)
so,
y=7x+12
x=(y-12)/7
so f-1(x)=(x-12)/7
- 8 years agoHelpfull: Yes(0) No(0)
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