Subject: Maths, asked on 23/5/18

## How to do this question number 22 on Quadratic equations?: 22. If  are the roots of the equation, x3-x-1=0, then $\frac{1+\mathrm{\alpha }}{1-\mathrm{\alpha }}+\frac{1+\mathrm{\beta }}{1-\mathrm{\beta }}+\frac{1+\mathrm{\gamma }}{1-\mathrm{\gamma }}$ has the value. a. 0       b. -1        c. -7       d. 1

Subject: Maths, asked on 23/5/18

## Let * be the operation on set {1,2,3,4,5} defined by a*b = H.C.F. ( a & b ). Form composition table and state whether the operation is binary or not. Also, check for commutative & assosciative properties. Does identity element exist ? Justify.

Subject: Maths, asked on 22/5/18

## que 11

Subject: Maths, asked on 21/5/18

## solve this with proper steps 9.  If f(x) = $\sqrt{{\mathrm{log}}_{1/2}\left({x}^{2}-2x+2\right)},$ then domain of f(x) is

Subject: Maths, asked on 20/5/18

## 3x=4x-1 then x can not be equal to 1) 2log3power2  2)2/2-log 2poewer3 ​3)1/1-log4power3 ​4)2log2power3/2log2power3-1

Subject: Maths, asked on 19/5/18

## Question 193 193.  Find the missing number from the options, if the same rule is applied in all the three figures. (a)  21                           (b)  25                       (c)  27                              (d)  29

Subject: Maths, asked on 19/5/18

## Consider functions f and g such that composite gof is defined and is one-one. Are f and g both necessarily one-one ?

Subject: Maths, asked on 19/5/18

## Show that if f: A to B and g: B to C are onto, then gof : A to C is also onto.

Subject: Maths, asked on 19/5/18

## If f: A to B and g: B to C then gof will be from A to C or fog will be from A to C ?

Subject: Maths, asked on 19/5/18

## What do we mean when we are saying (modulus of x) is x when x is positive and (modulus of x) is -x when x is negative ? Because regardless of x being positive or negative, we get modulus of x as x or in other words positive. please explain.

Subject: Maths, asked on 18/5/18

## If Z is a complex number such that: (Z^2018) = i +( 2018)^2018, then find the number of 1. Complex roots, 2. Roots lying in 2nd Quadrant and in 1st Quad

Subject: Maths, asked on 18/5/18

## Solve this:

Subject: Maths, asked on 17/5/18

## Suppose R = { (b,c) } How can this relation be transitive? There are only two elements in it. Then how ?

Subject: Maths, asked on 17/5/18

## How is a relation transitive when there is only one element in it ?

Subject: Maths, asked on 16/5/18

## if a,b,c  are positive real  numbers such that ab2c3=64 then minimum value of  1/a +2/b +3/c=?  (ans is 3)

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