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If output is produced according to Q = K1/2 + 3L1/2,then this production process exhibits:


A) increasing returns to scale.
B) decreasing returns to scale.
C) first increasing and then decreasing returns to scale.
D) constant returns to scale.
E) first decreasing and then increasing returns to scale.

F) C) and E)
G) All of the above

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The optimal combination of two inputs,K and L,can be characterized by:


A) PKMPK = PLMPL.
B) MPK = MPL.
C) PLMPK = PKMPL.
D) MPK /MPL = PL /PK.
E) none of the above.

F) A) and B)
G) A) and E)

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Diminishing marginal returns:


A) imply decreasing returns to scale.
B) occur at all combinations of input usage.
C) occur only for labor.
D) are consistent with increasing returns to scale.
E) are inconsistent with increasing returns to scale.

F) A) and E)
G) A) and D)

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The law of diminishing marginal returns is obvious because,if it didn't hold,it would be possible to:


A) feed everyone in the world by intensively cultivating one acre of land.
B) manufacture all of the cars in the world using just one of the world's existing factories.
C) increase total output of a product without employing additional inputs.
D) All of the above.
E) a and b.

F) A) and B)
G) B) and C)

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