calculus

Find the slope of the line secant to the following function passing through the given x-values:
f(x) = x3 + 5x; x = 3 and x = 6

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  1. If f(x)=x^3+5x
    then f(3)=27+15=42, f(6)=216+36=252
    and slope=(252-42)/(6-3)

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