Help me plz!!!

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Hi, can someone help me please with these two questions?

Same for this question. I'm not good with these kinds of problems so if someone could provide a how-to and the answer :)

Guest Mar 11, 2019

CPhill · Answer 1 · 2019-03-11T09:45:36

First one

f(2) = Ln (3*2) + 2.5 = Ln (6) + 2.5

f(7) = Ln (3*7) + + 2.5 = Ln ( 21) + 2.5

Avg rate of change from 2 to 7 =

[ f(7) - f (2)] [ (Ln(21 + 2.5) - (Ln(6) + 2.5) ] Ln(21) - Ln(6)

__________ = _________________________ = ___________ ≈ 0.25

7 - 2 5 5

CPhill · Answer 2 · 2019-03-11T09:53:26

Second one

Don't get intimidated, here !!!

f(64) = -∛ 64 = -4

f(8) = - ∛ 8 = -2

So

Avg rate of change from x = 8 to x = 64 is given by :

[ f(64) - f(8)] -4 - (-2) -2 -1

_________ = ______ = ___ = ___

64 - 8 56 56 28