Odpowiedzi

2010-01-24T16:30:12+01:00
1. Oblicz.
a) √20 : √45 =√20/√45 = √(20/45) = √(4*4/5*9) = √(4/9) = √(2*2/3*3) = 2/3

2. Wyznacz x .
∛9 :∛x = ∛63
x ≠ 0

∛9/∛x = ∛63
∛(9/x) = ∛63 obustronnie do 3 potęgi
9/x = 63
63x = 9
x = 9/63 = 9/7*9 = 1/7

jak masz pytania pisz na pw
2010-01-24T16:41:29+01:00
1. Oblicz.
a) √20 : √45 =
= √(20/45) = √(4/9) = (√4)/(√9) = 2/3

2. Wyznacz x .
∛9 :∛x = ∛63 |*∛x
∛9 = ∛63 * ∛x |/∛63
∛x = ∛(9/63) |()³
x = 9/63 = 1/7

2010-01-24T17:44:00+01:00
1.
a) √20 : √45 =√20/√45 = √(20/45) = √(4*4/5*9) = √(4/9) = √(2*2/3*3) = 2/3
2.
∛9 :∛x = ∛63
x ≠ 0
∛9/∛x = ∛63
∛(9/x) = ∛ 63 obustronnie do 3 potęgi
9/x = 63
63x = 9
x = 9/63 = 9/7*9 = 1/7