## mmend98 one year ago hello

1. mmend98

2. mmend98

I recieved B as my answer

3. mmend98

@ganeshie8

4. ganeshie8

|dw:1439761442349:dw|

5. ganeshie8

look at the graphs, what are the $$y$$ coordinates at which the blue line is intersecting the circle ?

6. ganeshie8

Ahh yes, you're right, it is B

7. mmend98

thank you

8. ganeshie8

np

9. mmend98

I have another one

10. mmend98

Which logarithmic graph can be used to approximate the value of y in the equation 2y = 3?

11. ganeshie8

not gonna help unless you use the proper ^ sign for exponent

12. mmend98

haha fair enough. 2^y=3

13. ganeshie8

good :) just want you know that writing 2y when you really mean 2^y can get you into problems..

14. mmend98

haha okay

15. ganeshie8

Since the base is $$2$$, we should be using the graph of $$\log_2x$$ |dw:1439762168005:dw|

16. mmend98

ok

17. mmend98

is that the final graph?

18. mmend98

this is my last one. thx again for the help

19. ganeshie8

Yes, notice that the function has the value 3 for the input 8 : |dw:1439762462352:dw|

20. mmend98

I got A.

21. ganeshie8

common ratio is $$\frac{1}{4}$$ which is clearly between $$-1$$ and $$1$$ so the sum converges by geometric series test we can eliminate options B and D safely

22. mmend98

it could be c tho right?

23. ganeshie8

A is correct!

24. ganeshie8

C is wrong because plugging i=1 does not give you the first term, 960

25. mmend98

thank you!

26. ganeshie8

yw