For function f(x,y) to have no extremum value at (a,b) is?
Posted: Thu Jul 14, 2022 9:29 am
a) rt – s2>0
b) rt – s2<0
c) rt – s2 = 0
d) rt – s2 ≠ 0
b) rt – s2<0
c) rt – s2 = 0
d) rt – s2 ≠ 0
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