√4*√7- 2√2a 2√7-2√2a 2(√7-√2a) =____________=_______________= __________________=
5((√2a)²-(√7)²) 5(√2a-√7)(√2a+√7) <span> 5(√2a+√7) ( √2a-√7)</span>
<span> 2</span>
<span>=_________</span>
<span>-5(√2a+√7 </span>
f '(x) = (3lnx² + cos(sinx) - √(x- 1))' = 6x/x² - sin(sinx)·cosx - 1/(2√(x- 1)) = 6/x - sin(sinx)·cosx - 1/(2√(x- 1))
9/ху=3х+4
ху=9/(3х+4)
у=9/(3х+4):х
у=9/х(3х+4)
H=h/(7*7)=343:49 = 7 см уровень жидкости
1)