(9/10)n=-18

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Solution for (9/10)n=-18 equation: 



(9/10)n=-18

We move all terms to the left:

(9/10)n-(-18)=0



Domain of the equation: 10)n!=0

n!=0/1

n!=0

n∈R



We add all the numbers together, and all the variables

(+9/10)n-(-18)=0

We add all the numbers together, and all the variables

(+9/10)n+18=0

We multiply parentheses

9n^2+18=0

a = 9; b = 0; c = +18;
Δ = b2-4ac
Δ = 02-4·9·18
Δ = -648
Delta is less than zero, so there is no solution for the equation

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