Find the change in y and the differential

Question

Let y= 4√x.

Find the change in y, when x=2 and the change in x is= 0.4 

Find the differential dy when x=2 and dx=0.4 

Answer 1

y= 4√x

 

dy= 4* -1/2 * x^-3/2 *dx

 

You can substitute the value of x and dx and find dy