Question: QUESTION: Let f : [ 3 , 5 ) [ 7 , 9 ) be defined by f ( x ) = x + 4

QUESTION: Let f:[3,5)[7,9) be defined by f(x)=x+4 and let g:[7,9)[49,81) be defined by g(x)=x2 .

1) Is the composition gof an injection? Is so, how do you prove this?

2) Is the composition gof a surjection? Is so, how do you prove this?

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