if f(x)=x-9 then find the value of f(x)-f(-x)
jagmanpal42:
is the answer 2x-18?
No the answer is either 0 or 2x
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The answer is wrong at last u have a equation x-9+x+9 and how u cancelled both x bcz they both have plus sign so it will be 2x
can u plz help me
Yes....... the answer is 2x
Answered by
4
f(x) = x-9
f(-x)= -x-9
f(x) - f(-x) = x-9-(-x-9) = x-9 +x +9 = 2x
f(-x)= -x-9
f(x) - f(-x) = x-9-(-x-9) = x-9 +x +9 = 2x
I hope it helps:)
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