The function f x -3 x -12 on R-isA- decreasingB- increasingC- neither increasing or decreasingD- strictly decreasing

The correct option is D strictly decreasing Let 1, 2εR and 1 lt; 2. Then, 1 lt; 2 → 31 gt; 32 31 + 12 gt; 32 + 12 (1) gt; (2) Thus, 1, ...

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Test for Monotonicity about a Point

The function ...

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The function f (x) = -3x + 12 on R.is

decreasing

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increasing

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neither increasing or decreasing

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strictly decreasing

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