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podryga [215]
2 years ago
13

Find the average rate of change of the function f over the given interval. f(x)=x^2-6/4x-8 from x=6 to x=8

Mathematics
1 answer:
kykrilka [37]2 years ago
4 0
f(x)=\frac{x^2-6}{4x-8}
\\
\\f(8)=\frac{8^2-6}{4\times8-8}= \frac{58}{24} = \frac{29}{12} 
\\
\\f(6)=\frac{6^2-6}{4\times6-8}= \frac{30}{16} = \frac{15}{8} 
\\
\\ \frac{f(8)-f(6)}{8-6} =\frac{\frac{29}{12} - \frac{15}{8} }{2} =\frac{\frac{116}{48} - \frac{90}{48} }{2} =\frac{\frac{26}{48}  }{2} =\frac{26}{96}=\frac{13}{48}
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Answer:

<h2>L.A. = 384 cm²</h2><h2>S.A. = 640 cm²</h2>

Step-by-step explanation:

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We have four congruent triangles with base b = 16cm and height h = 12cm.

The formula of an area of a traingle:

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