Resposta :
Resposta:
1)
a₇ = 3 *4⁷⁻¹ =3*4⁶ = 12288
2)
q=a₂/a₁=3/1=3
a₆= 1 * 3⁶⁻¹ =3⁵=243
3)
4=a₁*q
64=a₁*q³ ==>64=a₁*q * q² ==>64=4 *q² ==>q²=16
q =-4 ou q=4
Se q=4 ==> 4=a₁*4 ==>a₁= 1
a₁=1
a₂=4
a₃=16
a₄=64
.
.
a₉=1*4⁹⁻¹ =4⁸= 65536
Se q=-4 ==> 4=a₁*4 ==>a₁= -1
a₁=-1
a₂=4
a₃=-16
a₄=64
.
.