Например,
(5•5+78)-57=
(90:10)-6=
:)
Ответ:
3. 4
(3 )
Объяснение: Три в третьому і до четвертого
50+47+44+41+38+35+32+29+26+23+20+17+14+11+8+5+2+(-1)+(-4)+(-7)=430
Cos п/5*cos п/8=1/2сos(π/5-π/8)+1/2cos(π/5+π/8)=
=1/2cos3π/40+1/2cos13π/4<span>
Sin п/10*cos п/8=</span>1/2sin(π/5-π/8)+1/2sin(π/5+π/8)=
=1/2sin3π/40+1/2sin13π/4
1) y'=(2cos5x)'=-2sin5x*5=-10sin5x;
2) y'=(√x³)'=(x^(3/2)'=3/2x^(1/2)=3/2√x;
3) y'=((5x+7)^6)'=6(5x+7)^5*5=30(5x+7)^5.