No need to work out so much. You can tell the answer just by looking at the question. For x-|y| to be maximum |y| should be minimum and |x| should be maximum. minimum value of y=0. Put y=0 in second equation. It satisfies, so y=0. Now x can be either -4 or 7. maximum value =7. So 7-0= 7 Ans.
Your doing everything right except the last condition : -4y => y >= - 7/2
You're missing that "-" sign here. Thus, maximum value will be when x = 7 and y = 0 x - |y = 7 - 0 = 7
[QUOTE=Omkarp.
y| >= 0. So, minimum value y will take is 0. It also satisfies the given inequality.
Now, just find the max value of x. 9+5 = 14. And 2*7 = 14. So, x And so x| - |y The problem with your approach is that you are trying to minimize y, not |y. Hence, you are getting a different answer. Hope it helps.
1st equation: -9 -9+5 -4 -2 So, x lies between -2 to 7
2nd equation -21 -21 +7 -14 -7/2 So, y lies between -7/2 to 4 ... Hence, y can take a value of 0 also ...
So, max value of x - |y| will be x(max) - 0 i.e. 7-0 = 7 .
In your method you are making a mistake in the 4th equation. I hope am correct and clear.
I now realised why i always keep complaining about my speed ... I easily wasted 2-3 mins on this question whereas puys here solved(seems) by simply looking at the question.
I will try using the pencil less in the next aimcat. Hope it brings a change in my speed and increases my number of attempts.
Any tips on how to increase the number of attempts ... I attempted 16 with 15 c and 1 wrong.
Puys, i had 89 for 1316. But problem is that I got 16 questions wrong!! 7 for Sec 1 and 9 for Sec 2.. So, what could have been 100+ is not even 90..any tips on how to tackle this??
Can anyone provide me with Mock papers of TIME and CL of LAST YEAR in the pdf format ?? OR provide with any links to these papers ?? Need it urgently. TIA
Puys, i had 89 for 1316. But problem is that I got 16 questions wrong!! 7 for Sec 1 and 9 for Sec 2.. So, what could have been 100+ is not even 90..any tips on how to tackle this??
Work on your Accuracy first. Don't go for more of attempts. Try once attempting only 15-18 questions in each section and see what accuracy you have. Check on that in one Mock and then analyze it. You will get to know where you commit mistakes. 😃
hello every1......m comfortable wid session1 and lr(which i prepared till nw) but my prob is speed even though i know 25-28 questions i m able 2 attempt only 18-20 in quant wid accuracy around 80-85 % ........wht should i do 2 get the speed plz help me!!!!!!!
