Grade Upto college levelAlgebra
for any real x the expression 2(k-x)[x+(x2+k2)0.5] cannot exceed a)1 b)2 c)4 d)none of these
for any real x the expression 2(k-x)[x+(x2+k2)0.5] cannot exceed a)1 b)2 c)4 d)none of these
1 Answer
rahul ramabhadran
apply AM≥GM to the expression (k-x) and (x+(x2+k2)) and find the minimum value of AM and equate it as the maximum value of the GM.on simplification,you'll get the answer as 2
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