## is3535 one year ago help

1. is3535

@phi @partyqueen

2. is3535

@paki

3. is3535

|dw:1441998613082:dw|

4. is3535

@pinklion23

5. Nnesha

when we multiply same bases we should add exponents $\huge\rm x^m \times x^n=x^{m+n}$ and when we divide same base , subtract their exponents $\huge\rm \frac{ x^m }{ x^n }=x^{m-n}$

6. Nnesha

so $7^{-3} \times 7^{9}=?$

7. is3535

|dw:1441998736665:dw|

8. is3535

7^-14

9. Nnesha

hmm how did you get *negative * 14

10. is3535

i just guess

11. Nnesha

don't guess it's easy when multiply same bases we should add their exponents so $7^{-3} \times 7^{9}=\rm what ?$

12. pinklion23

lol

13. pinklion23

-3+9=9-3

14. is3535

117649

15. Nnesha

well don't use calculator

16. Nnesha

here is an example $\huge\rm 2^2 \times 2^3 = 2^{2+3} = 2^5$ base would stay the same $\large\rm 7^{-3} \times 7^9=7^{-3+9}=7^?$

17. is3535

2

18. Nnesha

mind telling how u got 2 ?

19. is3535

there 2 number 3 and 9

20. is3535

it so hard

21. Nnesha

i said just add exponents -3 and 9 are exponents 9-3= ??

22. is3535

9-3 = 6

23. Nnesha

yes right so numerator would be 7^6 $\huge\rm \frac{ 7^6 }{ 7^{-8} }$ 2nd exponent rule when we divide same base we should subtract their exponents here is an example $\huge\rm \frac{ 2^4 }{ 2^{-3} }=2^{4-(-3)}$

24. is3535

25. Nnesha

we would bec 2nd exponent is negative that would makes addition

26. is3535

4^2

27. Nnesha

what is 4^2 ?

28. is3535

|dw:1441999674369:dw|

29. Nnesha

here is an example $\huge\rm \frac{ 2^4 }{ 2^{-3} }=2^{4-(-3)}=2^{4+3}=2^7$ basically we are subtracting 4 from -3 4-(-3) but bec 3 is negative that would makes positive 3

30. Nnesha

what about 4^2 ? $\huge\rm \frac{ 7^6 }{ 7^{-8} } = ?$

31. is3535

i think it A OR B

32. Nnesha

i have no idea what A or B ...

33. is3535

|dw:1441999981329:dw|

34. Nnesha

look at the example then solve this $\huge\rm \frac{ 7^6 }{ 7^{-8} } = ?$

35. is3535

ok

36. Nnesha

here is an example $\huge\rm \frac{ 2^4 }{ 2^{-3} }=2^{4-(-3)}=2^{4+3}=2^7$ in this example base is 2

37. is3535

i said 2^7

38. Nnesha

you never said that anyways that's an example now solve ur question which is $\huge\rm \frac{ 7^6 }{ 7^{-8} } = ?$

39. Nnesha

move the exponent from denominator to top when you do that sign of the denominator exponent would change

40. is3535

ok ty

41. is3535

it was worng

42. Nnesha

which one ?

43. Nnesha

what did you get ?

44. Nnesha

i didn't give you the answer you didn't tell me which one you get

45. is3535

it was 7^14