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Find the value of a, b, c in the following quadratic equation : 2x2 ‒ x ‒ 3 = 0
Concept: Quadratic Equations
Write the quadratic equation whose roots are ‒2 and ‒3.
Concept: Quadratic Equations
For a sequence if n `S_n=n/(n+1)` then find the value of S10.
Concept: Introduction to Sequence
Verify whether 1 is the root of the quadratic equation : `x^2+3x-4=0`
Concept: Quadratic Equations
If one root of the quadratic equation kx2 – 7x + 12 = 0 is 3, then find the value of k.
Concept: Quadratic Equations
If α + β = 5 and α3 +β3 = 35, find the quadratic equation whose roots are α and β.
Concept: Quadratic Equations
(x + 5)(x - 2) = 0, find the roots of this quadratic equation
Concept: Quadratic Equations
The following data shows the number of students using different modes of transport:
Modes of Transport | Number of Students |
Bicycle | 140 |
Bus | 100 |
Walk | 70 |
Train | 40 |
Car | 10 |
From this table, find the central angle (θ) for the Mode of Transport ‘Bus’.
Concept: Tabulation of Data
Write the following quadratic equation in a standard form: 3x2 =10x + 7.
Concept: Quadratic Equations
If 12x +13y =29 and 13x +12y=21, find x + y.
Concept: Linear Equation in Two Variables
The product of four consecutive natural numbers, which are multiples of fives, is Rs. 15,000. Find those natural numbers.
Concept: Linear Equation in Two Variables
The time taken by a person to cover 150 km was 2 1/2 hours more than the time taken in the return journey. If he returned at a speed of 10 km/hour more than the speed while going, find the speed per hour in each direction.
Concept: Quadratic Equations
Find the values of a, b, c for the quadratic equation 2x2 = x + 3 by comparing with standard form ax2 + bx + c = 0.
Concept: Quadratic Equations
Find the first two terms of the sequence for which Sn is given below: `S_n=n^2(n+1)`
Concept: Introduction to Sequence
Find the value of discriminant (Δ) for the quadratic equation: `x^2+7x+6=0`
Concept: Quadratic Equations
Find the value of k for which the given simultaneous equations have infinitely many solutions:
kx + 4y = 10;
3x + 2y = 5.
Concept: Linear Equation in Two Variables
How many three digit natural numbers are divisible by 5?
Concept: Introduction to Sequence
Three horses A, B and C are in a race, A is twice as likely to win as B and B is twice as likely to win as C. What are their probabilities of winning?
Concept: Probability - A Theoretical Approach
State whether the given equation is quadratic or not. Give reason.
`5/4m^2 - 7 = 0`
Concept: Quadratic Equations
If S = {2, 4, 6, 8, 10, 12} and A = {4, 8, 12}, find A'
Concept: Probability - A Theoretical Approach