1) <span>3 3/23*23/27=72/23*23/27=72/27.
2)</span><span>1 1/5*1/6=6/5*1/6=1/5.
3) </span> 14 7/15-72/27-<span>1/5=217/15-72/27-1/5=(217*9-72*5-1*27)/135=1566/135=11 3/5.
Ответ 11 3/5.</span>
2<span>√7
1*</span><span>√3
6</span><span>√2
13
1.4
.........................</span>
Вот,если видно,
отсканировала,правильно точно
2х*2(-cos(2x-3)=2xsin(2x-3)+2x^2cos(2x-3)