15. Sequences, Series, and the Binomial Theorem

Find the common difference of the following sequence.

(A) $-9,-4,1,6,\dots$

Find the common difference of the following sequence.

(B) $\frac{7}{4},\frac{5}{4},\frac{3}{4},\frac{1}{4},\dots$

Write the first 5 terms of the arithmetic sequence, given the first term and the common difference.

(A) $a_1=-12;d=-5$

Write the first 5 terms of the arithmetic sequence, given the first term and the common difference.

(B) $a_1=\frac{3}{2},d=\frac{1}{4}$