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If k+3, 5k-1 and 3k+2 are in A.P., find ...

If `k+3, 5k-1` and `3k+2` are in A.P., find the value of k.

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To find the value of \( k \) such that the terms \( k + 3 \), \( 5k - 1 \), and \( 3k + 2 \) are in Arithmetic Progression (A.P.), we can use the property of A.P. that states: For three terms \( a_1, a_2, a_3 \) to be in A.P., the following condition must hold: \[ a_2 - a_1 = a_3 - a_2 \] ### Step-by-Step Solution: 1. **Identify the terms**: - Let \( a_1 = k + 3 \) - Let \( a_2 = 5k - 1 \) - Let \( a_3 = 3k + 2 \) 2. **Set up the equation using the A.P. property**: \[ a_2 - a_1 = a_3 - a_2 \] Substituting the values: \[ (5k - 1) - (k + 3) = (3k + 2) - (5k - 1) \] 3. **Simplify the left-hand side**: \[ 5k - 1 - k - 3 = 4k - 4 \] 4. **Simplify the right-hand side**: \[ 3k + 2 - 5k + 1 = -2k + 3 \] 5. **Set the two sides equal**: \[ 4k - 4 = -2k + 3 \] 6. **Combine like terms**: - Add \( 2k \) to both sides: \[ 4k + 2k - 4 = 3 \] This simplifies to: \[ 6k - 4 = 3 \] 7. **Add 4 to both sides**: \[ 6k = 3 + 4 \] This simplifies to: \[ 6k = 7 \] 8. **Divide by 6**: \[ k = \frac{7}{6} \] ### Final Answer: The value of \( k \) is \( \frac{7}{6} \).
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