Wat is de oplossingenverzameling
van de vergelijking
8x6 − 7x3− 1 = 0   ? 		A.   \(\{-1,+1\}\)
B.   \(\{1,\frac12\}\)
C.   \(\{1,-\frac12\}\)
D.   \(\{1,\frac14\}\)
E.   \(\{1,-\frac18\}\)
A    B    C    D    E

[ 5-4387 - op net sinds 16.12.11-(E)-3.5.2025 ]

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.   \(\{1,\frac12\}\)
C.   \(\{1,-\frac12\}\)
D.   \(\{1,\frac14\}\)
E.   \(\{1,-\frac18\}\)

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