plzzz solve this que by shortest method...plzzzz it's urgent...
Attachments:
Answers
Answered by
1
we write 56= 8p2
and 30= 6p2 ...
..see picture!
and 30= 6p2 ...
..see picture!
Attachments:
27jenny:
tq so much
pleasure to help!!
:-)
Answered by
1
Your answer is --
Given,
(m+n)P2 = 56
=> (m+n) (m+n-1) = 56
Since 8 × (8-1) = 56 ,
So, (m+n) = 8 ......(eq-1)
also given,
(m-n)P2 = 30
=> (m-n) (m-n-1) = 30
since, 6 × (6-1) = 30,
So, m-n = 6 ....(eq-2)
Now, add equation 1 & 2 , we get
2m = 14
=> m = 14/2
=> m = 7
put this value in equation (1) , we get
7 + n = 8
=> n = 8 - 7
=> n = 1
Hence, m = 7 & n = 1
【 Hope it helps you 】
Given,
(m+n)P2 = 56
=> (m+n) (m+n-1) = 56
Since 8 × (8-1) = 56 ,
So, (m+n) = 8 ......(eq-1)
also given,
(m-n)P2 = 30
=> (m-n) (m-n-1) = 30
since, 6 × (6-1) = 30,
So, m-n = 6 ....(eq-2)
Now, add equation 1 & 2 , we get
2m = 14
=> m = 14/2
=> m = 7
put this value in equation (1) , we get
7 + n = 8
=> n = 8 - 7
=> n = 1
Hence, m = 7 & n = 1
【 Hope it helps you 】
Similar questions