## newwar one year ago What is the value of the expression 7–3? A. –21 B. Negative Exponents C. Negative Exponents D. 343

1. newwar

2. anonymous

|dw:1441903391506:dw|do you know this?

3. anonymous

you there?

4. newwar

yes what do i do

5. newwar

hello

6. newwar

@imammalik_806

7. newwar

@itbribro

8. anonymous

rekt m8

9. anonymous

7 minus 3?

10. newwar

4

11. anonymous

k hold on lemme see

12. anonymous

oh bro

13. anonymous

its not 7 minus 3

14. anonymous

the 3 is an exponent

15. newwar

ok

16. newwar

so what do i do

17. anonymous

|dw:1441904338660:dw|see the pattern?

18. newwar

yes

19. anonymous

so we want to go the other direction for negative exponents. to do this we have to do the inverse operation of multiplication. do you know what the inverse operation of multiplication is?

20. newwar

no

21. anonymous

well, technically, we multiply by the reciprocal... but ususally people just call it division.

22. anonymous

|dw:1441904557762:dw|

23. newwar

ok

24. anonymous

so if we are at $$7^3$$ and we want to get to $$7^2$$, we divide by 7 or multiply by 1/7... okay?

25. anonymous

26. newwar

ok

27. anonymous

so let's take it a step further... let's figure out what $$7^0$$ should be , using the pattern...

28. newwar

k

29. anonymous

|dw:1441904754195:dw|

30. anonymous

can you figure out what $$7^0$$ is?

31. newwar

0

32. anonymous

no... let's follow the pattern. what is the number above $$7^0$$?

33. anonymous

you there?

34. newwar

yup

35. anonymous

so what is the number above $$7^0$$

36. anonymous

|dw:1441904990185:dw|

37. newwar

7

38. newwar

1/343

39. anonymous

very good!!! now we use the pattern. to go down (negative direction) we divide by 7. what is 7 divided by 7?

40. anonymous

it's the same as 7 times (1/7)...

41. newwar

-1

42. anonymous

7 divided by 7 is -1 ??? i don't think so, try again

43. newwar

just 1 sorry

44. anonymous

excellent!!!

45. anonymous

|dw:1441905368853:dw|so can you figure out the next number? again, follow the pattern...

46. newwar

7 by one

47. anonymous

? if you can use an expression or the the number

48. newwar

ok

49. anonymous

so what is it... i don't understand what number "7 by one" represents.

50. anonymous

don't be afraid... take your time and think, use the pattern and then respond. it's okay to make a mistake because i will help you to learn from it

51. newwar

sorry my computer went out

52. anonymous

that's alright... what did you get?

53. newwar

i thihnk it is c

54. anonymous

$$7^{-1}=\text{c?}$$

55. anonymous

just so you know... my goal here is to help you understand these types of problems. it is not to just help you get the answer for this problem.