In a G.P tn= (-1)" 2020. Find the common ratio
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-1 is common ratio if tₙ = (-1)ⁿ * 2020
Step-by-step explanation:
tₙ = (-1)ⁿ * 2020
Simply put n = 1 to get 1st term
t₁ = (-1)¹ ( 2020)
=> t₁ = -2020
Now put n = 2 to get 2nd term
t₂ = (-1)² ( 2020)
=> t₂ = 2020
Common ratio = t₂/t₁
= 2020/(-2020)
= - 1
-1 is common ratio
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