Mixed Sequences
Write the formula for the sequence: 12, 14, 16, 18, 20, .....
an=12 +2(n-1)
A bank account has $50 during the first week. You add $10 to your account every week. Write the formula to model the amount of money in your account.
an=50+10(n-1)
Write the formula if the first term is 20 and the common ratio is -3.
an=20(-3)n-1
Write the formula for the sequence: 3, 8, 13, 18, 22, .....
an=3 + 5(n-1)
The value of the 1st term when the 23rd term is 36 and the common difference is 2.
What is -8?
There are 4 rabbits in the zoo in the first month. The number of rabbits doubles each year. Write the formula to model the number of rabbits in the zoo.
an=4(2)n-1
Write the formula for the sequence: 80, 40, 20,...
an=80(1/2)n-1
Write the formula for the sequence: 4, 20, 100, ....
an=4(5)n-1
The first term is 4 and the second term is -4. Write the formula for the arithmetic sequence.
an=4-8(n-1)
The current population in New City is 10,000. Every year, the population increases by 50 people. Write the formula to model the population.
an=10050+50(n-1)
The first term is 4 and the second term is 20. Write the formula for the geometric sequence.
an=4(5)n-1
Write the formula for the sequence 375, 75, 15, 3, ...
an=375(1/5)n-1
The first term is 4 and the third term is 10. Write the formula for the arithmetic sequence.
an=4+7(n-1)
The current amount in your bank account is $100. Every month you deposit $75 in the the account. Write the formula to model the amount in your account.
an=175+75(n-1)
The first term is 2 and the second term is 72. Write the formula for the geometric sequence.
an=2(36)n-1