= 1.2*3* 1\10000 = 0.00036
<span>2) 12cb</span>²<span>/9bc</span>³ = 4b/3c²
<span>
3) 12ay</span>³<span>/-8a</span>²<span>y = - 3y</span>²/2a
<span>
4) -6p</span>³<span>q/-12q</span>³ = p³/2q²
<span>
5) -4ax</span>²<span>/12xy = - ax/3y
</span>
<span>
6) 9axy</span>²<span>/6ay</span>³ = 3x/2y
<span>
7) 48a</span>²<span>c</span>²<span>/38ac = 24ac/19
</span>
<span>
8) 63x</span>³<span>y</span>⁵<span>/84x</span>⁶<span>y</span>⁴ = 3y/4x³
cos(пи/2-x) - cos3x =0. вот и применяйте формулу разности косинусов.
A) y(-2a)(-3b)=6aby
b) 2xy*7xz=14x^2yz
в) 5ab*(-0,2b)=-ab^2
г) 4a+(a+b)-(2a+3b)=3a-2b
д) 2(x+3y)-3(3x-y)=-7x+9y