Question

dd

Answer 1

@ganeshie8

Answer 2

Reading the question, can you guess what the first term would be ?

Answer 3

32.55?

Answer 4

No, how much area has it covered in the first day ?

Answer 5

31

Answer 6

That's the first term. Easy.

Answer 7

ohh okay haha

Answer 8

thought i needed to use the 105%

Answer 9

I see, what you had earlier is the second term.

Answer 10

So, first term = 31

Answer 11

Look at the options and see if you can guess the correct answer

Answer 12

b?

Answer 13

Yes! good guess !

Answer 14

are these two correct?

Answer 15

#17 is wrong

Answer 16

#18 is correct

Answer 17

how do i do 17

Answer 18

You should get a negative answer for #17

Answer 19

http://www.wolframalpha.com/input/?i=625(-125%2F625)%5E(6-1)

Answer 20

-.2?

Answer 21

Yes

Answer 22

Very close, but it is wrong. Try again.

Answer 23

b?

Answer 24

Yep, exponent is n-1. This is always tricky haha

Answer 25

yeah confused me lol

Answer 26

correct?

Answer 27

and help with this

Answer 28

Some thing was terribly wrong with you if you weren't confused ;)

Answer 29

hahaha

Answer 30

1/2 is right

Answer 31

so thr sequence is

2, 4, 8, ...

Answer 32

My first feeling is that it may be geometric.

Answer 33

So I'd like to find the common ratio

Answer 34

2?

Answer 35

Yes, what's the first term ?

Answer 36

2

Answer 37

so c?

Answer 38

Good, so whats the formula for nth term ?

Answer 39

C it is! good

Answer 40

would it be a?

Answer 41

yes

Answer 42

this is boring, looks you have mastered these sequences and series by now ;)

Answer 43

theres only two more can you just double check for me

Answer 44

shoot

Answer 45

d?

Answer 46

What's the common ratio here ?

Answer 47

1/5,which is below 1

Answer 48

That means the series converges for sure.
Google for the sum of infinite geometric series formula

Answer 49

oh okay

Answer 50

105?

Answer 51

yes

Answer 52

i just have one left and i have no idea how to do it, but then were done I'm sorry

Answer 53

lets see

Answer 54

So the given expression is -5i + 2

Answer 55

Plugin i = 1 to get the first term

Answer 56

first term = -5*1 + 2 = ?

Answer 57

-3?

Answer 58

Yes, notice that common difference is -5 here.

Answer 59

okay

Answer 60

first term = -3
common difference = -5

Can you find the sum of the first 10 terms ?

Answer 61

what is n? 10?

Answer 62

so -255?

Answer 63

Very good !

Answer 64

forgot one lol how much do you hate me

Answer 65

Find the sum of a finite arithmetic sequence from n = 1 to n = 15, using the expression 2n + 5.

Answer 66

Haha, not much yet ;)

Answer 67

So we have 15 terms in the arithmetic sequence

Answer 68

the expression is 2n+5

plugin n = 1 to get the first term

Answer 69

7

Answer 70

Can you eyeball the common difference from the given expression ?

Answer 71

2

Answer 72

Perfect! You knew the formula for sum