7.. Given the values of a and d, write the first three terms of the arithmetic sequence. Then, write the formula for the general term. a) a = 5, d = 2 b) a = -2, d = −4 c) a = 9, d = -3.5 d) a = 0, d = 1 2

What is the sum of the arithmetic sequence (-10) + (-6) + (-2) + ...90?

Which of the following is the explicit formula for the sequence (-2, -6, -18, -54, -162, ..}? a. an%3D(3)n+1 O b. a,= -2(3)"-1 Ocan=n-4 Odan=3n-2 1 0c. - 4 3D3D-2 %3D

a) Find the common difference for the arithmetic sequence: 14 + 8 + 2 + ... + (-274) + (-280) b) Find the number of terms n of the arithmetic sequence: 14 + 8 + 2 + ... + (-274) + (-280) c) Find the sum of the arithmetic sequence: 14 + 8 + 2 + ... + (-274) + (-280)