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J ika f ( x ) = 4 x 4 − x 3 − x 2 + 2 1 ​ x d iba g i d e n g an ( 2 x + 2 ​ ) s i s an y a a d a l ah ...

  1. -2

  2. -1

  3. negative 1 half

  4. 1 half

  5. 1 half square root of 2

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D. Kamilia

Master Teacher

Mahasiswa/Alumni Universitas Negeri Malang

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Pembahasan

f left parenthesis x right parenthesis equals 4 x to the power of 4 minus x cubed minus x squared plus 1 half x space d i b a g i space d e n g a n space left parenthesis 2 x plus square root of 2 right parenthesis  2 x plus square root of 2 equals 0  2 x equals negative square root of 2  x equals negative 1 half square root of 2  f left parenthesis x right parenthesis equals 4 x to the power of 4 minus x cubed minus x squared plus 1 half x  f open parentheses negative 1 half square root of 2 close parentheses equals 4 x to the power of 4 minus x cubed minus x squared plus 1 half x  space space space space space space space space space space space space space space space space space space space equals 4 open parentheses negative 1 half square root of 2 close parentheses to the power of 4 minus open parentheses negative 1 half square root of 2 close parentheses cubed minus open parentheses negative 1 half square root of 2 close parentheses squared plus 1 half open parentheses negative 1 half square root of 2 close parentheses  space space space space space space space space space space space space space space space space space space space equals 4 open parentheses 1 fourth close parentheses plus 1 fourth square root of 2 minus 1 half minus 1 fourth square root of 2  space space space space space space space space space space space space space space space space space space space equals 1 minus 1 half  space space space space space space space space space space space space space space space space space space space equals 1 half

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