फलन (f(x)=-2x-2+8x+1) का परिसर क्या है?
What is the range of (f(x)=-2x-2+8x+1)?
Explanation opens after your attempt
A. (\(-\infty,9]\)
Concept
(f(x)=-2(x-2)2+9), so the maximum value is (9). A downward-opening parabola has range (\(-\infty,9]\).
Why this answer is correct
The correct answer is A. (\(-\infty,9]\). (f(x)=-2(x-2)2+9), so the maximum value is (9). A downward-opening parabola has range (\(-\infty,9]\).
Exam Tip
(f(x)=-2(x-2)2+9), इसलिए अधिकतम मान (9) है। नीचे की ओर खुलने वाले परवलय का परिसर (\(-\infty,9]\) होता है।
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