1-а = a+b/a-b
2-a = -(x^5/x^7)
Y ' = ( (x^2 + 1)*(e^x - 2) ) ' = (x^2 + 1) ' *(e^x - 2) + (x^2 + 1)*(e^x - 2) ' =
= 2x *(e^x - 2) + e^x*(x^2 + 1)
y ' = (sinx )' = cosx
y ' = (4x^2 - 3^x - 1) ' = 4*2x - 3^x ln 3 - 0 = 8x - 3^x ln 3
1) 4+3=8x-2x
7=6x
x=7\6
2)3x-3=4x+8
-8-3=4x-3x
-11=1x
x=-11