Wat is de oplossingenverzameling
van de vergelijking
8x6 − 7x3− 1 = 0   ?
A.   { − 1, +1 }
B.   { 1, 1op2 }
C.   { 1, min1op2 }
D.   { 1, 1op4 }
E.   { 1, −1op8 }
A    B    C    D    E

[ 5-4387 - op net sinds 16.12.11-(E)-29.10.2023 ]

Translation in   E N G L I S H

What is the
solution set
of the equation
8x6 − 7x3− 1 = 0  ?
A.  { − 1, +1 }
B.  { 1, 1op2 }
C.  { 1, min1op2 }
D.  { 1, 1op4 }
E.  { 1, −1op8 }

Oplossing - Solution

8x6 − 7x3− 1 = 0
8y2 − 7x− 1 = 0  ∧  y = x3
(y − 1)(8y + 1) = 0  ∧  y = x3
[ y = 1  ∨  y = − 1/8 ]  ∧  y = x3
x3 = 1  ∨  x3 = − 1/8
x = 1  ∨  x = -1/2
gricha