Official Quant thread for CAT 2013

@Faruq said:
If f(x ˆ' 1) + f(x + 1) = f(x) and f(2) = 6, f(0) = 1, then what is the value of f(50)?1) ˆ'72) 63) 14) 7
F(x+2)=-f(x-1)
F(2)= f(50)
@albiesriram said:
2/3 r^2
@albiesriram said:
OA:-

@ScareCrow28 said:
Roots -> a, 2a11x^2 + (3k+4)x - (3k+1) = 0Sum = 3a = -(3k+4)/11 = -(3k+1)/11 - 3/11 = 2a^2 - 3/11=> 22a^2 - 33a -3 = 0What after this ?? Value of K hoga bhai..what is the meaning of value of "x" ?? We can find k
Sorry bhai. statement hi wrong thi

If one of the roots of the equation 2x^2+(3k+4)x+(9k^2-3k-1)=0 is twice the other, then which of the following can be the value of K?
-2/3
2/3
-1/3
1/3




@Faruq said:
Sorry bhai. statement hi wrong thiIf one of the roots of the equation 2x^2+(3k+4)x+(9k^2-3k-1)=0 is twice the other, then which of the following can be the value of K?-2/32/3-1/31/3
Woi to bolra tha :P

Ans: -1/3 ( This time by simply putting the value )
@albiesriram said:

both not hitting=1/5*1/3=1/15
both hitting=4/5 *2/3 =8/15

probability of no result=9/15=3/5
4/5*1/3 (1+3/5 +(3/5)^2+.....)
4/5 *1/3 (5/2)
2*1/3
2/3


@Subhashdec2 said:
both not hitting=1/5*1/3=1/15both hitting=4/5 *2/3 =8/15probability of no result=9/15=3/5 4/5*1/3 (1+3/5 +(3/5)^2+.....)4/5 *1/3 (5/2)2*1/32/3
thda explain krge isko
@Subhashdec2 said:
both not hitting=1/5*1/3=1/15both hitting=4/5 *2/3 =8/15probability of no result=9/15=3/5 4/5*1/3 (1+3/5 +(3/5)^2+.....)4/5 *1/3 (5/2)2*1/32/3
Isme kya galti hai bhai ??

(4/5 +1/3 ) +(4/5 *2/3 * 4/5 * 1/3) + (4/5 *2/3 *4/5 *2/3 * 4/5 *1/3)+...................
@Faruq said:
Isme kya galti hai bhai ??(4/5 +1/3 ) +(4/5 *2/3 * 4/5 * 1/3) + (4/5 *2/3 *4/5 *2/3 * 4/5 *1/3)+...................
bhai pehla wala multiplication h na?
and isme ye panga h ki if both dont hit wo consider nahi kiya

@ishu1991 said:
thda explain krge isko
bhai kya samajh ni aaya ye to btao
@Subhashdec2 said:
bhai kya samajh ni aaya ye to btao
bhai vo to smjh aa gya ki bth not hitting both hitting vala prob of no reslt aa gya smjh uske bad kya kiya kaise cases liye ye btado bas

@ishu1991 said:
thda explain krge isko
OA:-

@Subhashdec2 said:

2*1/32/3
@Asfakul said:
ABCD is a quadrilateral with integral sides and perimeter of 36 cm . How many different quadrilaterals ABCD can be formed?
@grkkrg @Subhashdec2 please take a look
@albiesriram said:
It is analogous to a+b+c+d = 36.39C3 if we consider A, B,C, D points..
but in this solutions are are cases where same case has been repeated more than once.
@albiesriram said:
e) 3rt(3)/2?
@iLoveTorres said:
e) 3rt(3)/2?
Approach ?
@albiesriram said:
is it b? ...
@ChirpiBird said:
is it b? ...
OA ...