(1)
y = x1/2
(a)
dy/dx = (1/2) / x1/2 = (1/2).x-1/2
d2y/dx2 = d/dx(dy/dx) = - (1/2).(1/2).x-3/2 = - (1/4).x-3/2
Since x > 0, [- (1/4).x-3/2] > 0, which means that the function is concave.
(b)
Since y = x1/2,
x = y2
Total cost: C(y) = w.x = w.y2
AC(y) = C(y)/y = w.y
MC(y) = dC(y)/dy = 2w.y
(c)
Firm's supply function is its MC function. So, Firm supply curve:
p = 2w.y
y = p / 2w
(d)
Revenue (R) = p.y = 10y
Profit = R - C(y) = 10y - w.y2
NOTE: As HOMEWORKLIB Answering Policy, 1st question is answered.
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