<em>1) f'(x)=(cos(3/4x - 1))'=-(3/4)sin(3/4x - 1)</em>
<em>2) f'(x)=(sin(x/4 - 7))'=(1/4)cos(x/4 - 7)</em>
<em>3) f'(x)= (cos(0,8x - 3))'=-0.8sin(0.8x - 3)</em>
<em>4) f'(x)= (x² + x³ + eˣ -4)'=2x+3x²+eˣ</em>
<em>5) f'(x)= (2ˣ + eˣ - sinx)'=2ˣ㏑2+eˣ-cosx</em>
<em>6) f'(x) = (9x² - cosx)'=18x+sinx</em>
1/(а-в)в + а/в=(1+(а-в)*а)/(а-в)*в= ИЛИ
(1+а²-ав)/(а-в)*в.
<span>6x-4y=10
6x=10+4y
x=10/6 +4/6 y
x=5/3+2/3 y
x=5/3 +2/3 y
</span><span>11+3y=39
3y=39-11
3y=28
y=28/3
y=9 1/3 =9.3333
</span>