You can put this solution on YOUR website! What is the composition of two funcions: basic
(g or r )(4)
(r or q )(4)
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You have to have an equation for q and an equation for r to find (gor)4
If you have those gor(4) = g[r(4)]
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Similarly you have to have an equation for r and for q to find (roq)(4))
If you have those rog(4) = r[g(4)]
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Cheers,
Stan H.
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