Find segment

[Valentas]

Find segment which length would be 6/7 and function \(\displaystyle f(x) = 49x + \frac{100}{x} \)

in that segment middle point gain the maximum value of -140

 

[tkhunny]

What sort of segment?
What do we do with the function?
A midpoint can have only one value. A maximum value at a mpoint makes little sense.
Maximum value of what.

You'll need a better translation.