If \(2x, x + 4\) and \(x + 1\) are in A.P., then the value of x is:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 7
Three numbers are in an A.P. when the difference stays the same, that is, when twice the middle term equals the sum of the other two.
Twice the middle term equals the sum of the first and third terms: \(2(x+4)=2x+(x+1)\)
\(2x+8=3x+1\)
\(x=7\)