(1) differentiate y=2/√x and (2) find dy/dx y=9x^3-1/x^5+5x^2-1

What two criteria are needed for triangles to be similar

Two students were asked if they liked to read. is this a good example of a statistical question? why or why not? a yes, this is a good statistical question because a variety of answers are given. b yes, this is a good statistical question because there are not a variety of answers that could be given. c no, this is not a good statistical question because there are not a variety of answers that could be given. no, this is not a good statistical question because there are a variety of answers that could be given

Is this a polynomial function? i need to know asap