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5 September, 11:45

Let f (x) = x2 + 6 and g (x) = x+8/x. Find (g o f) (-7)

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  1. 5 September, 12:10
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    (g o f) (x) = g (f (x))

    so

    (g o f) (-7) = g (f (-7)) =

    g ((-7) ^2+6) =

    g (49+6) =

    g (55) =

    55+8/55=

    55 ad 8/55

    (g o f) (-7) = 55 and 8/55

    (if you meant g (x) = (x+8) / x, then the result is 63/55 or 1 and 8/55)
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