Show that the function f(x) =x2/2+lnx-2cosx is an increasing function for x=R+
Pawan joshi , 5 Years ago
Grade 12th pass
Differential Calculus> Show that the function f(x) =x2/2+lnx-2co...
1 Answers
Arun
Last Activity: 5 Years ago
Dear student
f’(x) = x + 1/x + 2 sin x
now we know thqt x+ 1/x will always we greater than 2 sin x
hence f’(x) is positive always .
hence f(x) is an increasing function
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