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x+3<1<2x+9

From x+3<1, x<-2
From 2x+9>1, x>-4

so x=-3

OA:D
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the given relation x+3<1<2x+9
is only valid for x= -3
IMO D ; one is correct

How many integers of x are there so that x+3<1<2x+9 ?

(A) Four
(B) Three
(C) Two
(D) One
(E) None
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Quote:
How many integers of x are there so that x+3<1<2x+9?

(A) Four
(B) Three
(C) Two
(D) One
(E) None

\(x+3<1<2x+9\)
\(x+3<1…x<-2\)
\(1<2x+9…-8<2x…-4<x\)
\(-4<x<-2:x=-3\)

Ans (D)
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x+3<1<2x+9
This is the same as x+3<1 and 1<2x+9
x+3<1 means x<-2
and 1<2x+9 means -4<x
we now have -4<x<-2
-3 is the only integer that falls within the given range.

The answer is therefore option D.
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x +3 < 1 —> x <—2
2x+ 9 > 1 —> x >—4

—> x=—3
There is only one integer.

The answer is D

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Bunuel

Competition Mode Question



How many integers of x are there so that \(x + 3 < 1 < 2x + 9\) ?

(A) Four
(B) Three
(C) Two
(D) One
(E) None

Since x + 3 < 1, then x < -2.

Since 1 < 2x + 9, then -8 < 2x, and therefore, -4 < x.

We see that -4 < x < -2. Since x is an integer, x can be only -3. Therefore, there is only one solution for x.

Answer: D
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