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f(x) =x3+2x2-7x+5
f^1(x) =3x2+4x-7
f^1(2)=3(2)^2+4(2)-7
=3(4)+8-7
=12+1
=13(B)
25)(2x-180+5.000/x).x
=2x2-180x+5.000
turunan:
4x-180=0
4x=180
x=45
substitusi ke persamaan atas
2(45)^2-180(45)+5.000
2(2.025)-8.100+5.000
=4.050-8.100+5.000
=950
=950.000(d)
26)