4) k=f`(xo)
f`=21sin3x+10cos5x
f`(pi/3)=21sinpi+10cos5pi/3=10cos(2pi-pi/3)=-10*1/2=-5
k=-5
5)y`=2*10(2x+5)^9=20(2x+5)^9
8000*{((2x+5)^10}^10*(2x+5)^17-20(2x+5)^9=///
4) k=f`(xo)
f`=21sin3x+10cos5x
f`(pi/3)=21sinpi+10cos5pi/3=10cos(2pi-pi/3)=-10*1/2=-5
k=-5
5)y`=2*10(2x+5)^9=20(2x+5)^9
8000*{((2x+5)^10}^10*(2x+5)^17-20(2x+5)^9=///