Question: 1. The fourth term in an arithmetic sequence is -6, and the 10th term is 11. Find the common difference and the first term. O

the first five terms. (Assume that the sequence is defined for n

The fourth term in an arithmetic sequence is -6, and the 10th term is 11. Find the common difference and the first term. O 17 d = 6 01: 31 A 2 17 29 d= 6 : 41 2 11 d = 31 6 : a1 2 29 d= 11 6 : a j=. Find the sum of the first five terms. (Assume that the sequence is defined for n 2 1.) an = n3 - n OA 210 O B 235 OC 240 OD 223Write using sigma notation. 54 X 9 + 2x 18 + 3x 27 + 4x 36 + 5x 45 + 6x OA 6 9n E mX x=1 OB 6 9n Enx x =8 OC 6 Enx x= 1 OD 13 9n E nx x=1Find the sum of the first 25 positive integers: 2+ 4+6+8+... OA 654 O B 650 OC 620 OD 624

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