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Fungsi akan menjadi fungsi definit positif bila nilai a berada pada interval...

Fungsi f left parenthesis x right parenthesis equals 2 x squared minus a x plus 2 akan menjadi fungsi definit positif bila nilai a berada pada interval...

  1. a > -4

  2. a > 4

  3. -4 < a < 4

  4. 4 < a < 6

  5. -6 < a < 4

Jawaban:

S y a r a t space d a r i space s u a t u space f u n g s i space d e f i n i t space p o s i t i f space a d a l a h space colon D less than 0 space d a n space a greater than 0 b squared minus 4 a c less than 0 b e r a r t i left parenthesis negative a right parenthesis squared minus 4 left parenthesis 2 right parenthesis left parenthesis 2 right parenthesis less than 0 a squared minus 16 less than 0 open parentheses a plus 4 close parentheses open parentheses a minus 4 close parentheses less than 0 minus 4 less than a less than 4

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