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Q1. 0∫10 [ (x2+2)/(x2+1) ] dx = (A) 0 (B) 2 (C) 5 (D) none of these ( [.] denotes G.I.F. ) ...

tan x + cot x ...

*Image* find Va-Vb a.3V b.5V c.7V d.9V i m not getting any of the options????? ...

f(x)=x2 -2x-a2 +1 g(x)=x2 -(a2 +a+1)x+a2 +a Q1. The number of values of a for which f(x)=0 and g(x)=0 have exactly one common root. Q2. The range of a for which the bigger root of g(x)=0 is greater than the bigger root of f(x ...

1. if a and b are integers and x2 + ax + b =0 has discriminant as a perfect square then prove that its roots are integers. SOLUTION IS : roots are { - a± √ ( a2 -4b)} / 2 if a2 -4b = 4m , then a will be even and roots will ...

why f(x) a quadratic func depoends on sign of " a" in a2+bx+c =0 means like if a>0 f(x) >0 .. nd wen a<0 f(x) <0 i mean why does it npot depend on b,c ?? even after finding out da roots of the EQ am not getting an ...

There are 15 tickets numbered from 1 to 15 . Find the number ways in which 3 units having 5,3 and 2 tickets with consecutive numbers can be selected distributed amongst 3 children. ...

In a game, a man wins a rupee for a six and loses a rupee for any other number when a fair die is thrown.The man decided to throw a die thrice but to quit as and when he gets a six. Find the expected value of the amount he wi ...

Q. A cube of ice of edge 4cm is placed in an empty cylindrical glass of initial diameter 6 cm. Assume that the ice melts uniformly from each side so that it always retains its cubical shape. Remembering that ice is lighter th ...

Q. C7H8O has how many isomers ?? a.2 b.3 c.4 d.5 Sir do we have to keep making structure and count or is there an easier was out ? :) ...

With usual rotation, in any ΔABC which of the following is/are true...? a) Ex radius opposite to B, altitude through A, Ex radius opposite to C are in H.P. b) If the sines of angles A,B,C are in A.P. then the altitudes of th ...

find the area under the curve and make the graph of it also Q For t>0, find the minimum value of 01∫ x |e-x2-t|dx ...

*Image* please make me understand why its twice and all 2pa << :-/ ...

This year's ISC board class 12 question papers : ...

point "A" lies on d curve y=e-x2and has d coordinates{x,e-x2} wer x>0.point B has d coordinates{x,0}.if O iz d origin then the max area of triangle AOB is a)1/√2e b)1/√4e c)1/√e d)1/√8e ...

What reagents (think of all possible reagents that can be used) which can perform this conversion successfully ? *Image* I know three;lets see how many you can think of !! [6][6] ...

hi!!!!! everyone.............. pls post ur suggestions , tips...... anything & everything which is helpful to ur juniors. I hope every one will contribute ........ & help others not to repeat the same mistake which they commi ...

∫√x /√x3+a3 ...

A technique of solving diffential equations deals with the Laplace Transformations of a function. Let ƒ(t) be a function of 't' defined for all +ve values of t , then 0∫∞ e - st ƒ(t) dt ; is called the Laplace transform ...

3 particles at the vertices of an equilateral triangle follow each other and move witha velocity v. side length = l find the acceleration of each particle at t=T. ...

It is given that a polynomial with rational coefficients has n real roots. One of them is 1+ 5 Prove that 1- 5 is another root! Please realise that the implication of this are very huge and very very important in guessing sec ...

Now a sitter after the toughie yesterday! 1+ 2 is the root of x3+bx+a find a and b? if both are rationals... ...

cos x + sin x ...

Each element of array X [-15.....10, 15.......40] requires 2byte storage. If da array is COLUMN MAJOR-WISE with beginning location 1500. Determine location of [5,20] PL. reply fast!!!!!! I m getting 1500 + 505*2 nebody's ans ...

∫ f(x)/x3-1 where f(x) is a polynomial of degree 2 in x such that f(0)=f(1)=3f(2)=-3 ...

evaluate a,b,c,d if lim x→∞ (√x4+ax3+3x2+bx+2)-(√x4+2x3-cx2+3x-d=4 ...

1. IN PCl5 ALL BONDS ARE EQUIVALENT AND HAVE SAME BOND LENGTH <TRUE/FALSE> EXPLAIN WITH DIAGRAM :) 2. HOW HYBRIDISATION EFFECTS BOND LENGTH , DOES IT MAKES ALL OF THEM EQUAL AND EQIVALENT .. PLEASE EXPLAIN . :) ...

*Image* two steel rods and an aluminium rod of equal length l0 and equal cross section are joined rigidly at their ends a sshown in the figure below. all the rods are in a state of zero tension at 00C. Find the length of the ...

If each element of a second order determinant is either zero or one, what is the probability that the value of the determinant is positive? (Assume that the individual enteries of the determinant are chosen independently, eac ...

*Image* ...