Solve and type in 'ab' 8×a=32,a+26=b+1,a< 20< b

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Ответ:

Gabby1128

29.01.2020

Mathematics

Solution:

$S(x)=\frac{3600}{60+x}-1\\\\ S'(x)= 3600\times\frac{-1}{(60+x)^2}$

If , y = $\frac{1}{x}, {\text{then y' means it's derivative}= \frac{-1}{x^2}$

As average speed = Rate of change of distance

for s=0 , 3600=60+x

x= 3540 seconds

for s= 1 mile, x= 5656 seconds

As , average speed = $\frac{S_{2}-S_{1}}{t_{2}-t_{1}}=\frac{1-0}{5656-3540}=\frac{1}{2116}$ m/sec=0.0004725 m/sec

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