Wat is de oplossingenverzameling van
2log2 (x3 + 4x + 1) = 8x + 1 		A.   { 0, 1, 2 }
B.   { 0, 2 }
C.   { 0, − 2, 2 }
D.   { − 2, 2 }
E.   { 0, − 2 }
                 

[ 6-6299 - op net sinds 19.12.2020-(E)-23.10.2023 ]

Translation in   E N G L I S H

What is the solution set of
2log2 (x3 + 4x + 1) = 8x + 1 		A.   { 0, 1, 2 }
B.   { 0, 2 }
C.   { 0, − 2, 2 }
D.   { − 2, 2 }
E.   { 0, − 2 }

Oplossing - Solution

De gegeven vergelijking is gelijkwaardig met
  x³ + 4x + 1 = 8x + 1
⇔ x³ − 4x = 0
⇔ x.(x² − 4) = 0
⇔ x = 0  ∨  x² = 4
⇔ ...