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Thursday, January 12, 2006

dont work out. scribe (this is not how i want it to look, is different from ms word)

Before we beginning, just let you know:
t1 means 1st Term, t2 means 2nd Term, t3 means 3rd Term, tn means next Term
tn = # + #(n-1)
t1 = #
tn = t(n-1) + #
# = the difference between 2 numbers
# = The first term number
Today’s class we have do the following questions:

1. Write a Recursive formula for each sequence.

a. 7,14,21,25.… Answer: tn = 7 + 7(n-1)
OR,
t1 = 7,
tn = t(n-1) + 7


b. 12,8,4,0,….. Answer: tn = 12-4(n-1)
OR,
t1 = 12,
tn = t(n-1) - 4


2. Write the 1st. 4 tearm of each sequence


a. t1 = 4
tn = t(n-1) - 3

Answer: 4, 1, -2, -5
t1, t2 , t3, t4
to get the answer we need to
subtract 3 form the last term
we know 4 is the first term already
because it say in the beginning of
the question t1 = 4, now to get the
next term we substract 3 the get the
Next term and so on.

b. t1 = -6
tn = t(n-1) + 5

Answer: -6, -1, 4, 9
3. Find a formula for an arithmetic sequence whose common difference is 5 and whose second term is 12.

Answer: tn = 5(n-1) + 7
OR
t1 = 7
tn = t(n-1) + 5

to find the answer we first need to find the
first term and to do that we will:
___, 12
^
5
12 - 5 = 7 and that is how we do it
4. Show that sq. rt. 2, sq. rt. 8, sq. rt. 18.…. is an arithmetic sequence.

First we simplify all the sq. rt.

Answer: sq. rt. 2, 2sq. rt. 2, 3sq. rt. 2 so the common difference is sq. rt. 2


5. Insert one number between 7 and 13 to make an arithmetic sequence

7, _____, 13
^ ^
d d
We use the last term subtract the first term 13 - 7 = 6 then divide 6 into 2 difference 6/2 = 3 so now we use 7 + 3 = 10

Answer: 7, 10, 13

6. Complete this arithmetic sequence.

16, ___, ____, 25, ___

We use the same solution as question 5
25 - 16 = 9 from 16 to 25 there is 3 difference so we divide 9 by 3 which equals 3.

Answer: 16, 19, 22, 25, 28

and this is about it, for the last 15 mins of class i dont know how to spell and write
it in blog so i can help you guys and girl. sry.

HW is exercise 60
tomarrow's scribe will be SIR. TIM math y for not making a web page on best buy.
thank you and good bye

good luck on the unit test whenever that is, and good luck on the exam, and o yeah, good luck
on your grade 11 math exam next term. bye.
one more thing, good luck on your grade 12 math exam next year. bye now for really
one more thing, good luck on your year of first year of university math exam. good bye for sure
one more thing, marry christmas and a happy new year. good bye now . for really real.

1 Comments:

At 1/12/2006 10:26 PM, Anonymous Anonymous said...

a really long good lucks and good byes, eh? haha...

 

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