Question

Q=f(L,K)= K1/4.L1/4 is the production function increasing, decreasing or constant?

Answer 1

$Q(L,K)=L^β,K^α$

Q = K^¼ L^¼ 

Adding the powers β and α

¼+ ¼ = ½

β+α <1 implies a decreasing returns to scale.