The first step is to simplify the given expression,
dividing it by 10 both sides:
10|10n -
8|<80
|10n -
8|<8
Now, we'll discuss the absolute value of the
expression 10n - 8:
Case 1) 10n - 8 for 10n -
8>=0
10n>=8
n>=8/10
n>=4/5
We'll
solve the inequality:
10n - 8 <
8
10n < 16
n <
16/10
n <
1.6
The interval of admissisble value of n,
for this situation, is [4/5 , 1.6).
Case 2)
8 - 10, for 10n -
8<0
n<4/5
We'll
solve the inequality:
8 - 10n <
8
-10n < 0
10n >
0
n >
0
The interval of admissible values for n,
for this case, is (0 , 4/5).
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