Science (English Medium) Class 11 - CBSE Question Bank Solutions for Mathematics

A line passes through (x₁, y₁) and (h, k). If slope of the line is m, show that k – y₁ = m (h – x₁).

If three point (h, 0), (a, b) and (0, k) lie on a line, show that `q/h + b/k = 1`

Consider the given population and year graph. Find the slope of the line AB and using it, find what will be the population in the year 2010?

Find the values of k for which the line (k–3) x – (4 – k²) y + k² –7k + 6 = 0 is 

1. Parallel to the x-axis,
2. Parallel to the y-axis,
3. Passing through the origin.

Find the equation of a line drawn perpendicular to the line `x/4 + y/6 = 1`through the point, where it meets the y-axis.

Find the value of p so that the three lines 3x + y – 2 = 0, px + 2y – 3 = 0 and 2x – y – 3 = 0 may intersect at one point.

Find the equation of the lines through the point (3, 2) which make an angle of 45° with the line x –2y = 3.

Name the octants in which the following points lie:

(1, 2, 3), (4, –2, 3), (4, –2, –5), (4, 2, –5), (–4, 2, –5), (–4, 2, 5),

(–3, –1, 6), (2, –4, –7).

The x-axis and y-axis taken together determine a plane known as_______.

Coordinate planes divide the space into ______ octants.

Three vertices of a parallelogram ABCD are A (3, –1, 2), B (1, 2, –4) and C (–1, 1, 2). Find the coordinates of the fourth vertex.

If the origin is the centroid of the triangle PQR with vertices P (2a, 2, 6), Q (–4, 3b, –10) and R (8, 14, 2c), then find the values of a, b and c.

Evaluate the following limit.

`lim_(x -> 3) x + 3`

Evaluate the following limit.

`lim_(x -> pi) (x - 22/7)`

Evaluate the following limit:

`lim_(r -> l) pir^2`

Evaluate the following limit.

`lim_(x -> 4) (4x + 3)/(x - 2)`

Evaluate the following limit.

`lim_(x-> -1) (x^10 + x^5 +1)/(x -1)`

Evaluate the following limit.

`lim_(x -> 0) ((x+1)^5 - 1)/x`

Evaluate the following limit.

`lim_(x- > 2) (3x^2 - x - 10)/(x^2- 4)`

Evaluate the following limit.

`lim_(x -> 3) (x^4 - 81)/(2x^2-5x - 3)`