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a123
 4 years ago
Can somebody help me? I've tried to solve this problem and I just can't manage to get the right answer: 7x + 2 > 2
a123
 4 years ago
Can somebody help me? I've tried to solve this problem and I just can't manage to get the right answer: 7x + 2 > 2

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satellite73
 4 years ago
Best ResponseYou've already chosen the best response.1true for all x by inspection absolute value is positive, so it is always bigger than 2

a123
 4 years ago
Best ResponseYou've already chosen the best response.0how do you write it like a < x < b or something like that?

satellite73
 4 years ago
Best ResponseYou've already chosen the best response.1it is all real numbers x can be anything. do not try to solve this using algebra. absolute value of anything is always greater than or equal to 0, so it must be always greater than 2. it doesn't matter what you put in for x, positive number or negative number

satellite73
 4 years ago
Best ResponseYou've already chosen the best response.1\[(\infty,\infty)\]

a123
 4 years ago
Best ResponseYou've already chosen the best response.0wait, why is one of the infinity symbols negative if x is always greater than or equal to 0?

LagrangeSon678
 4 years ago
Best ResponseYou've already chosen the best response.0what satellite means by (inf,inf) is that you can plug any x value into the inequality, you can plug in 20000, 200, 3,4, 5, it dosent matter, you will still get a value greater than or equal to zero

a123
 4 years ago
Best ResponseYou've already chosen the best response.0i still don't understand why, if you plug in a negative number, it comes out to be greater than or equal to zero

LagrangeSon678
 4 years ago
Best ResponseYou've already chosen the best response.0beacuse of the absolute value, you see the absolute value guarantees you that the value you get out will be positive or zero, it cannot be negative
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