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F (X) = − | X + 1 | + 3 on R . - Mathematics

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प्रश्न

f (x) = \[-\] | x + 1 | + 3 on R .

बेरीज

उत्तर

Given: f(x) =\[- \left| x + 1 \right|\] + 3

Now,

\[- \left| x + 1 \right| \leq 0\] for all x \[\in\] R.

\[\Rightarrow\] f(x) = \[- \left| x + 1 \right|\] + 3 \[\leq\] 3 for all x \[\in\] R
\[\Rightarrow\] f(x) \[\leq\] 3 for all x \[\in\] R
The maximum value of f is attained when

\[\left| x + 1 \right| = 0 . \]

\[ \Rightarrow x = - 1\]

Therefore, the maximum value of f at x = -1 is 3.

Since f(x) can be reduced, the minimum value does not exist, which is evident in the graph also.

Hence, the function f does not have a minimum value.

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पाठ 18: Maxima and Minima - Exercise 18.1 [पृष्ठ ७]

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आरडी शर्मा Mathematics [English] Class 12
पाठ 18 Maxima and Minima
Exercise 18.1 | Q 7 | पृष्ठ ७

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