Mạch điện 3 pha 380/220V có dây trung tính cung cấp điện cho tải 3 pha gồm các bóng đèn sợi đốt loại 220V-60W (bóng đèn được xem như thuần trở ), biết pha C có 6 bóng đèn. Tính dòng điện chạy trong pha C

we have been given a quadratic function and we need to restrict the domain such that it becomes a one to one function.

we know that vertex of this quadratic function occurs at (5,2).

further, we know that range of this function is .

if we restrict the domain of this function to either or , it will become one to one function.

let us know find its inverse.

upon interchanging x and y, we get:

let us now solve this function for y.

hence, the inverse function would be if we restrict the domain of original function to and the inverse function would be if we restrict the domain to .

myth. it was once thought that animals, including cats and dogs, could only see in black and white. however, scientists have proven this to be a myth. in all animals, including humans, the perception of colour is determined by the presence of cells in the eye called cone photoreceptors.