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15-09-2018
Mathematics

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let f(x)= 7x-13.find f powered to the negative 1 power (x)

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sarahkn sarahkn

15-09-2018

Let f(x) be y so you have
y=7x-13
Reverse the signs of x and y so you have
x=7y-13
And then find the value of y
x+13=7y
(x+13)/7=y
And change y to f(x)-1

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