Answer:
q =  5000/x  + 6
Step-by-step explanation:
D´= dq/dx  =  - 5000/x²
dq = -( 5000/x²)*dx
Integrating on both sides of the equation we get:
q = -5000*∫ 1/x²) *dx
q = 5000/x + K Â in this equation x is the price per unit and q demanded quantity and K integration constant
If when  1006 units are demanded when the rice is 5 then
x = 5   and  q = 1006
1006 Â = Â 5000/5 +K
1006 - 1000 = K
K = 6
Then the demand function is:
q =  5000/x  + 6