Respuesta :
-14 < = 2n - 2 < = 14...this is how u set it up for less then
add 2 to everythng
2 - 14 < = 2n - 2 + 2 < = 14 + 2...simplify
-12 < = 2n < = 16 ....divide everything by 2
-12/2 < = (2/2)n < = 16/2...simplify
-6 < = n < = 8 <== ur answer ( n is greater then or equal to -6 and less then or equal to 8)
add 2 to everythng
2 - 14 < = 2n - 2 + 2 < = 14 + 2...simplify
-12 < = 2n < = 16 ....divide everything by 2
-12/2 < = (2/2)n < = 16/2...simplify
-6 < = n < = 8 <== ur answer ( n is greater then or equal to -6 and less then or equal to 8)
ok, so
remember that the absolute value signs make whatever is inside positive (actually measures the distance but saying it makes it positive is easier)
so example
|3|=3
|-3|=3
what we do to solve is like this
if
|x|=y
assume that
x=y and x=-y
so
|2n-2|≤14
assume
2n-2≤14 and 2n-2≥-14 because remember that negative flips the relation symbol
solve each
2n-2≤14
add 2 to both sides
2n≤16
divide both sides by 2
n≤8
other one
2n-2≥-14
add 2 to both sides
2n≥-12
divide by 2
n≥-6
so
n≤8 and n≥-6
or
-6≤n≤8
basically all numbers from -6 to 8
S={n | -6≤n≤8}
remember that the absolute value signs make whatever is inside positive (actually measures the distance but saying it makes it positive is easier)
so example
|3|=3
|-3|=3
what we do to solve is like this
if
|x|=y
assume that
x=y and x=-y
so
|2n-2|≤14
assume
2n-2≤14 and 2n-2≥-14 because remember that negative flips the relation symbol
solve each
2n-2≤14
add 2 to both sides
2n≤16
divide both sides by 2
n≤8
other one
2n-2≥-14
add 2 to both sides
2n≥-12
divide by 2
n≥-6
so
n≤8 and n≥-6
or
-6≤n≤8
basically all numbers from -6 to 8
S={n | -6≤n≤8}