Question

Write a function rule to represent the sequence.

0.3, 0.9, 1.5, 2.1,...

A(n) = 0.6 + (n - 1)0.3
A(n) = 0.6 - (n)0.3
A(n) = 0.3 + (n - 1)0.6
A(n) = 0.3 + (n + 1)0.6

Write a function rule to represent the sequence.

47, 32, 17, 2,...

A(n) = 47 + (n - 1)15
A(n) = 47 + (n - 1)(-13)
A(n) = 47 + (n - 1)(-15)
A(n) = 32 + n - 1)15

I can tell the difference of the numbers between both the questions, but when I try to plug in the values into the equation, I'm not getting it right:/ Please help?

Answer 1

nevermind i got it:p

Answer 2

#1 clearly A grows by 0.6 for each new term.

suppose A(n) = 0.6(n-1)

But, when n=0, A(0) = 0.3 so just add that at the start.

A(n) = 0.6(n-1) + 0.3

#2 A(n) starts at 47 and drops by 15, so start with

A(n) = 47-15(n-1)

The (n-1) stuff pops up because the first term (n=1) has not yet added or subtracted anything. If the sequence started with A0 instead of A1, then that would not be necessary.

Answer 3

Huh.

i would post answers but the practice would not show them.

Answer 4

They're both C

Answer 5

Y E E is correct!

Answer 6

This is stupid. Why should you have to do a bunch of unnecessary steps to figure out what number comes next when we can easily keep it basic and still figure out the right answer?

Answer 7

ITS COMPLETELY WORTHLESS AND JUST MAKES YOUR HEAD SPIN!!!

Answer 8

Thank you guys hall help me alot

Answer 9

yes c is right

Answer 10

FULL PRACTICE

1. 18, 22
2. -14, -20
3. 20,000, 200,000
4. 5.5, 6.6
5. B
6. A
7. B
8. A
9. C
10. C