Question

The common difference of A.P.: $1,-1,-3,....$ is _______

• A. $-1$
• B. $+2$
• C. $-2$
• D. $+1$

Answer 1

Answer: (C)

$-2$

The common difference d of A.P. is given by the difference between second term and first term.
$\therefore d=-1-1=-2$
Option $C$ is correct.