1. Rozwiąż równanie |½x-4|=2
2. Wyznacz liczbę x, wiedząc, że 4log₂x=25
zad1
/1/2x-4/=2
1/2 x-4=2 /·2 ∨ -(1/2x-4)=2
x-8=4 / +8 ∨ -1/2x+4=2 /·(-2)
x=12 ∨ x-8=-4 /+8
x=4
zad2
4log₂x=25
log ₂x⁴=25
2²⁵=x⁴
x⁴=(2⁶)⁴·2
x=⁴√(2⁶)⁴·2
x=2⁶ ·⁴√2
x=64 ·⁴√2
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zad1
/1/2x-4/=2
1/2 x-4=2 /·2 ∨ -(1/2x-4)=2
x-8=4 / +8 ∨ -1/2x+4=2 /·(-2)
x=12 ∨ x-8=-4 /+8
x=4
zad2
4log₂x=25
log ₂x⁴=25
2²⁵=x⁴
x⁴=(2⁶)⁴·2
x=⁴√(2⁶)⁴·2
x=2⁶ ·⁴√2
x=64 ·⁴√2