Question

Which of the following is a solution of the compound inequality -1 < 2n + 1 < 5?


n > 2 or n < -1

-1 < n < 5

n < -2 or n > 4

-1 < n < 2

Answer 1

@Michele_Laino

Answer 2

please you have to solve these inequlities:
\[2n+1<5\]
and
\[2n+1>-1\]

Answer 3

so, for example, soving the first one we have:
\[2n<5-1\]
\[2n<4\]
and then:
\[n<2\]
now, please solve the second inequality

Answer 4

n>-1 @Michele_Laino

Answer 5

that's right!

Answer 6

so, what is your option?

Answer 7

-1 < n < 2?

Answer 8

@Michele_Laino

Answer 9

well done!

Answer 10

yay

Answer 11

:)