Question

Determine a razão de cada uma das seguintes p.g.:
a ) ( 2,6,18,...) q =_____
b) ( 6,3,...) q = ______
c) ( 4, -20,...) q =_____
d) ( 10, 20, ...) q=_____
e) ( 1, 7, 14, 21, 28, ...) q=_____

Answer 1

Resposta:

a ) ( 2,6,18,...) q =_____

a₂ = a₁.q²⁻¹

6 = 2.q¹

q = 3

b) ( 6,3,...) q = ______

a₂ = a₁.q²⁻¹

3 = 6.q

q = 1/2

c) ( 4, -20,...) q =_____

a₂ = a₁.q²⁻¹

-20 = 4.q

q = -5

d) ( 10, 20, ...) q=_____

a₂ = a₁.q²⁻¹

20 = 10.q

q = 2