Find F(x)=ax+b
F(y)=ax+b
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F(x)=f(y)=ax+b....... ....
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1
then,
a=2 in 1 equation
a+b=3
2+b=3
b=2-3
b=1
f=2x+1
a=2 in 1 equation
a+b=3
2+b=3
b=2-3
b=1
f=2x+1
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