Question 16 5 pts Use the formula for the general term (the nth term) of a geometric sequence to find the indicated term of the sequence with the given first term, a1, and common ratio, r. Find ag when a1 = 2000, r = = 4007 2 O 125 32 125 125 10Use the formula for the sum of the first n terms of an arithmetic sequence to find the indicated sum. 85 3i i = 1 O 10,962 O 10,836 O 10,965 O 11,094 PreviousQuestion 18 Find the indicated sum. Find the sum of the first 53 terms of the arithmetic sequence: 2, 4, 6, 8, . .. O 2862 O 2915 2869 108Question 19 5 pts Write a formula for the general term (the nth term) of the arithmetic sequence. Then use the formula for an to find a20, the 20th term of the sequence. 20, 16 , 12, 8, ... O an = 4n - 24; a20 = 56 O an = 24 - 40; a20 = -56 Q an = 4n - 20; a20 = 60 Dan = 20 - 4n; 320 = -60 vious Quiz saved at 9:1\fD Question 21 Write the first four terms of the sequence defined by the recursion formula. a1 = -2 and an = -4an-1 for n = 2 O -2, 10, -34, 130 O -2, -8, -32, -128 O -2, 8, -32, 128 O 2, -8, 32, -128