Cho hàm số y f x  ( )
có đồ thị như hình vẽ bên. Số nghiệm của phương trình
2 1 0 f x   
là

Find the volume of the solid whose base is the region bounded by f(x), g(x) and the x-axis on the interval [0, 1], and whose cross-sections perpendicular to the y-axis are squares. your work must show the integral, but you may use your calculator to evaluate it. give 3 decimal places for your answe

Which of the following parabolas opens up?

Cos^2x+cos^2(120°+x)+cos^2(120°-x)i need this asap. pls me