prosze o wytlumaczenie, wiem,że banał ,ale jak robi sie 100 innych zadan to juz nic sie nie wie ; )
Dane :
a₃ = 4
a₄ = -2
q = -2/4 = - ½
an = a₁ * qⁿ ⁻ ¹
a₄ = a₁ * (-1/2) ⁴⁻¹
-2 = a₁ * ( -1/2)³
-2 = a₁ *(- 1/8) l *(- 8 )
a₁ = 16
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Dane :
a₃ = 4
a₄ = -2
q = -2/4 = - ½
an = a₁ * qⁿ ⁻ ¹
a₄ = a₁ * (-1/2) ⁴⁻¹
-2 = a₁ * ( -1/2)³
-2 = a₁ *(- 1/8) l *(- 8 )
a₁ = 16