1) -6×(2×(-25)-7)+3= -6×(-50-7)+3= -6×(-57)+3=342+3=345;
2) 11×(2×(-4)-4)=11×(-8-4)=11×(-12)= -132;
3) 1 1/9×(3×36-9)-2=1 1/9×99-2=110-2=108
<span>3/13</span> =( <span>3·10)/(13·10)</span> = <span>30/130</span>
<span>2/10</span> = (<span>2·13)/(10·13</span> )= <span>26/<span>130</span></span>
1)верный
2)нет
f(-2)=4 f(1)=-4
3)нет
f(x)<0 x∈(-1;3)