Introduction to Math Proof
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yraal1823
Mathematics
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Question No. 4: Let f , g : R→R be functions defined by f(x)=x^3+x^2 and g(x)=4x-9. Find f∘g and g∘f. What can you conclude about the commutativity of the operation?
Question No. 5: Suppose f : X→Y and g : Y→Z are functions. If f and g are one-to-one, then so is g∘f.
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