Question 1 :
Let a, b be non-zero real numbers. Which of the following statements about the quadratic equation $ax^2 + (a+b) x + b = 0$ is necessarily true?<br/>(I) It has at least one negative root.<br/>(II) It has at least one positive root.<br/>(III) Both its roots are real.
Question 2 :
The set of values of '$p$' for which the expression $x^2-2px+3p+4$ is negative for at least one real $x$ is-
Question 3 :
The value of k for which the roots are real and equal of the following equation<br/>$x^2$ - 4kx + k = 0 are k = 0, $\dfrac{1}{4}$
Question 4 :
Find the value of K so that sum of the roots of the equations $3x^2 + (2x - 11) x K - 5 = 0$ is equal to the product of the roots.
Question 5 :
If the equation $\displaystyle \lambda x^{2}-2x+3= 0$has positive roots for some real$\displaystyle \lambda $, then
Question 6 :
<b>Statement 1 : </b>Coefficient of ${ x }^{ 14 }$ in ${ \left( 1+2x+{ 3x }^{ 2 }\cdots +{ 16x }^{ 15 } \right) }^{ 2 }$ is 560<br><br><b>Statement 2 :</b> $\sum _{ r=1 }^{ n }{ r(n-r)\quad =\quad \cfrac { n({ n }^{ 2 }-1) }{ 6 } } $<br><br>
Question 7 :
If the $nth$ term of the AP $9, 7, 5..$ is same as the $nth$ term of the AP $15, 12, 9,...$, find $n.$
Question 8 :
Find the number of terms common to the two A,P's $3,7,11,.....,407$ and $2,9,16,..........,709$
Question 9 :
If in$\displaystyle \triangle ABC$ and$\displaystyle\triangle DEF$,$\displaystyle \frac{AB}{DE}=\frac{BC}{FD}$ then they will be similar if
Question 10 :
In quadrilateral ABCD, the diagonals AC and BD intersect each at point O. If $AO=2CO$ and $BO=2DO$; Then,$\displaystyle \Delta AOB$ is similar to $\displaystyle \Delta COD$<br/>
Question 11 :
In $\triangle ABC \sim \triangle DEF$ such that $AB = 1.2\ cm$ and $DE = 1.4\ cm$. Find the ratio of areas of $\triangle ABC$ and $\triangle DEF$.
Question 12 :
D and F are mid-points of sides AB and AC of a triangle ABC. A line through F and parallel to AB meets BC at point E. Find AB (in cm), if EF = 4.8 cm.
Question 13 :
If HCF of numbers $408$ and $1032$ can be expressed in the form of $1032x -408 \times 5$, then find the value of $x$.
Question 14 :
If $x=6+2\sqrt {6}$, then what is the value of $\sqrt { x-1 } +\cfrac { 1 }{ \sqrt { x-1 } } $?