Assertion (A): Common difference of the AP $5, 1, -3, -7, \ldots$ is $4$.

Reason (R): Common difference of the AP $a_1, a_2, a_3, \ldots, a_n$ is obtained by $d = a_n - a_{n-1}$.

Question

Assertion (A): Common difference of the AP $5, 1, -3, -7, \ldots$ is $4$.

Reason (R): Common difference of the AP $a_1, a_2, a_3, \ldots, a_n$ is obtained by $d = a_n - a_{n-1}$.

Accepted Answer

Step 1: Common difference $d = 1 - 5 = -4$, not $4$. Assertion (A) is false. Reason (R) is true ($d = a_n - a_{n-1}$).

Question