Fortune Favours the Bold 🥇 Use coupon MBASHAURYA 🥳 Get a Flat ₹ 7000 Off on Complete Cracku. Grab now
Edit MetaData
The total number of integers pairs (x, y) satisfying the equation x + y = xy is
0
1
2
None of the above
xy = x + y
=> xy - x - y = 0
=> xy - x - y + 1 = 1
=> (x - 1) (y - 1) = 1
=> Both x - 1 and y - 1 have to be equal to 1 or -1.
So, values taken by (x,y) are (2,2) and (0,0).
=> 2 solutions
Hi. Instead of doing it this way, I divided both sides by xy to get 1/x + 1/y = 1. I marked 1 as the answer because as per this equation only one solution -- ie 2,2 can exist. Can you please clarify
Hi Anushka,When you divide it by xy, it will eliminate (0, 0) case.Thanks
Create a FREE account and get:
CAT Data change over a period
CAT Arrangement
CAT Table based DI Sets
CAT Games and Tournamnents
CAT Special Charts
CAT Puzzles
CAT Scheduling
CAT Maxima-Minima
CAT Data Interpretation Basics
CAT Venn Diagrams
CAT Data Interpretation
CAT Charts
CAT Quant Based DI
CAT DI Miscellaneous
CAT Routes And Networks
CAT Selection With Condition
CAT DI with connected data sets
CAT Quant Based LR
CAT Coins and Weights
CAT 2D & 3D LR
CAT Miscellaneous LR
CAT Truth Lie Concept
Login to your Cracku account.
Enter Valid Email
Follow us on
Incase of any issue contact support@cracku.in
Boost your Prep!
Join cracku.in for Expert Guidance.