1.

The common difference of the A.P. $$\frac{1}{3},$$ $$\frac{{1 - 3b}}{3},$$$$\frac{{1 - 6b}}{3},$$. . . . . .is

A. $\frac{1}{3}$$
B. $ - \frac{1}{3}$$
C. $ - b$$
D. $b$$
Answer» D. $b$$


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