4acm/18amt = 2c/9t - сократили на 2am
2sinx-√2=0
2sinx=√2
sinx=√2/2
x=π/4 + 2πn, n∈Z
y`=20x³-8
59+49=108
80-64=16
Ответ:108,64.
1 -3.5/21:1.22/63=-68/21:85/63=-68/21*63/85=-12/5
2 1.3/35:1.1/56=38/35:57/56=38/35*56/57=16/15
3 -12/5+16/15=-20/15=-4/3=-1.1/3