1.

Find the maximum and the minimum values, if any, without using derivatives of the following functions : f(x) = – |x + 1| + 3 on R

Answer»

We know that, 

– |x + 1| ≤ 0 for every x ∈ R. 

Therefore, 

g(x) = – |x + 1| + 3 ≤ 3 for every x∈ R. 

The maximum value of g is attained when |x + 1| = 0 

|x + 1| = 0 

x = – 1 

Since, 

Maximum Value of g = g( – 1) 

= – | – 1 + 1| + 3 = 3 

Hence, function g does not have minimum value.



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