Думаю:
1)60* 3,4=204,0(руб)на этой суммы больше,потратил коля денег.
Делим на 1,5
5610/1,5=3740
1)-6
2)-3
3)6
4)11
5)-3
6)16
7)-28
8)-1
1) f(x) = x - tg(-2x)
f " (x) = (x - tg(-2x) ) " = x " - tg " (-2x) = 1 + 2/cos^2 (-2x)
f " (0) = 1 + 2/cos^2 (-2*0) = 1 + 2/1 = 1 + 2 = 3
f " (pi) = 1 + 2/cos^2 (-2pi) = 1 + 2/1 = 1 + 2 = 3
2) f(x) = 2sin 2x - V2*x
f " (x) = (2sin 2x - V2*x) " = (2sin 2x) " - (V2*x) " = 2*2*cos 2x - V2*1 =
= 4cos 2x - V2.
f " (0) = 4cos 2*0 - V2 = 4*1 - V2 = 4 - V2.
3) f(x) = cos 2x
f " (x) = (cos 2x) " = -2*sin 2x
10.
log₃(15 :⁵/₉)+(-4)=log₃27-4=3-4=-1