👤

Potrzebna pomoc z 1-4

Potrzebna Pomoc Z 14 class=

Odpowiedź :

Odpowiedź:

zad 1

a₆ = a₁ + 5r

a₈ = a₁ + 7r

a₁+5r + a₁+7r = 4

2a₁ + 12r = 4 | ; 2

a₁ + 6r = 2

a₁ + 6r = a₇ = 2

zad 2

an = 1/3 * n + 2

a₁ = 1/3 * 1 + 2 = 1/3 + 2 = 2 1/3

a₂ = 1/3 * 2 + 2 = 2/3 + 2 = 2 2/3

r = a₂ - a₁ = 2 2/3 - 2 1/3 = 1/3

zad 3

a₁ = 36

a₂ = 6x

a₃ = 25

a₂² = a₁ * a₃ = 36 * 25 = 900

a₂ = √900 = 30

zad 4

a₁ = - 3

a₄= a₁q³ = 192

a₄/a₁ = a₁q³/a₁ = q³

q³ = 192

q = ∛192 = ∛(64 * 3)= 4∛3