1) y=(9-7x)^y' = 6(9-7x)^5 * (-7) = -42(9-7x)^5
2) y=√(9x+1y' = (1/2)(9x+1)^(-1/2) * 9 = 9/(2√(9x+1))
3) y=cos(x/2+π/4y' = -sin(x/2+π/4) * (1/2) = -sin(x/2+π/4) / 2
4) y=(2/5)x+y' = 2/5
1) y=(9-7x)^
y' = 6(9-7x)^5 * (-7) = -42(9-7x)^5
2) y=√(9x+1
y' = (1/2)(9x+1)^(-1/2) * 9 = 9/(2√(9x+1))
3) y=cos(x/2+π/4
y' = -sin(x/2+π/4) * (1/2) = -sin(x/2+π/4) / 2
4) y=(2/5)x+
y' = 2/5