+37146 First one Geometric ratio , r = 1/5 change 1 to -15 to make arithmetic with d = -20
You try the next one......or four.....
+37146 Second one arithmetic with d = -6 change 13 to 14.44 make it geometric with r = .76
+129852 1. 25, 5 , 1 geometric..... an = 25(1/5)(n - 1)
2. 25, 19, 13.....arithmetic.....an = 25 - 6(n - 1) = 31 - 6n
3. 4, 9 , 16 .......neither.. we have no common difference or common ratio...but if we changed it to 4, 10, 16.....then arithmetic ....an = 4 + 6(n - 1) = -2 + 6n
4. 50, 60, 70 ......arithmetic.....an = 50 + 10(n - 1) = 40 + 10n
5. 1/2, 3, 18 .....geometric.......an = (1/2)(6)^(n - 1)
+26393 Please solve the whole problem fully
see: https://web2.0calc.com/questions/for-each-sequence-decide-whether-it-could-be-arithmetic#r1
+93 Arithmetic sequences always have the same common difference (d), each number changes by the same value
Geometric sequences have a common ratio (r). The common ratio is multiplied to every number to get the next
Neither, I am assuming that you mean that the sequence has no common ratio or difference.
+93 Arithmetic sequences always have the same common difference (d), each number changes by the same value
Geometric sequences have a common ratio (r). The common ratio is multiplied to every number to get the next
Neither, I am assuming that you mean that the sequence has no common ratio or difference.
(Whoops posted that twice)
You can always use these rules for each sequence to figure out which one is which.
