dissa

Ans a)

IMO - yes. 0

x-y =2 (x-y)^2 = 4 x^2+ y^2 -2xy =4 10 -2xy = 4 xy = 3 x^2 + y^2 = (x+y)^2 - 2xy (x+y) = 16 x+ y = +/- 4 xy (x+y) = 3x 4 =12 OR 3x-4 =-12 Ans E

Yes. The OA is C :)

Whimsical (A) Chivalrous (B) Perfect © Predictable (D) Hidden (E) Backward

yeah!! Thanks for the correction.I corrected it. :)

Question is incomplete. That's why I've used "if" the tot # is x...:)

If total # of students in the class is x; # of students took history class = y # of student didn't take class = x-y percentile = (x-y)/x x100 % ans E

hmm.. b/n between? I didn't get it. :) My answer is here, h(n) = 2 x 4 x .....n h(100) = 2 x 4 x ...100 h(100) + 1 = (2 x 4 x ...100 + 1) = 2^50 (1 x 2 x...50) +1 if we divide this any number below 50; 1 would be the remainder. So that the smallest prime factor would be greater than 50. Ans (E)

@ Abhishek, x^2 = 9==> x = +/- sqrt (9) = +/- 3 y^2 = (x^2)==> y = sqrt(x^2) =+/-x :) sqrt (x^2) = +/- x PS: keep in mind; when we take sqrt of anything there are two solutions(+ or -)!!

3.Ans (E) f(x) =-3x f(a)= -3a--(1) f(b)= -3b---(2) f(a+b)= -3 (a+b) (1) + (2) f(a) + f (b) = -3a + (-3b) = -3 (a+b) f (a+b) =f (a) + f (b) 2. ans (E) (sqrt x^2)/ x = (+/- x)/x

Answer- 50% (D)

If "a" is a positive interger; 30 x a a # of multiples of 30 = 12 The least common multiple for 30 & 12 = 60 60 x a a # of multiples of both 12 & 30 = 6 The frction = 6/12 = 1/2 Ans E

Answer D x4-25x2= -144 x4-25x2 + 144 = 0 x4 -16x2-9x2 +144 = 0 (x2 - 16) (x2 - 9) = 0 ==> (x2 - 16) = 0 OR (x2-9) = 0 x2 = 16 OR x2 = 9 x = sqrt16 OR x= sqrt9 x =+/- 4 OR x = +/-3 Ans D

My answer also D. what is the OA?