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Arts (English Medium) Class 11 - CBSE Question Bank Solutions

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Find the equation of the parabola that satisfies the following condition:

Focus (0, –3); directrix y = 3

[10] Conic Sections
Chapter: [10] Conic Sections
Concept: undefined >> undefined

Find the equation of the parabola that satisfies the following condition:

Vertex (0, 0); focus (3, 0)

[10] Conic Sections
Chapter: [10] Conic Sections
Concept: undefined >> undefined

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Find the equation of the parabola that satisfies the following condition:

Vertex (0, 0) focus (–2, 0)

[10] Conic Sections
Chapter: [10] Conic Sections
Concept: undefined >> undefined

Find the equation of the parabola that satisfies the following condition:

Vertex (0, 0) passing through (2, 3) and axis is along x-axis

[10] Conic Sections
Chapter: [10] Conic Sections
Concept: undefined >> undefined

Find the equation of the parabola that satisfies the following condition:

Vertex (0, 0), passing through (5, 2) and symmetric with respect to y-axis.

[10] Conic Sections
Chapter: [10] Conic Sections
Concept: undefined >> undefined

If a parabolic reflector is 20 cm in diameter and 5 cm deep, find the focus.

[10] Conic Sections
Chapter: [10] Conic Sections
Concept: undefined >> undefined

An arch is in the form of a parabola with its axis vertical. The arch is 10 m high and 5 m wide at the base. How wide is it 2 m from the vertex of the parabola?

[10] Conic Sections
Chapter: [10] Conic Sections
Concept: undefined >> undefined

The cable of a uniformly loaded suspension bridge hangs in the form of a parabola. The roadway which is horizontal and 100 m long is supported by vertical wires attached to the cable, the longest wire being 30 m and the shortest being 6 m. Find the length of a supporting wire attached to the roadway 18 m from the middle.

[10] Conic Sections
Chapter: [10] Conic Sections
Concept: undefined >> undefined

An equilateral triangle is inscribed in the parabola y2 = 4 ax, where one vertex is at the vertex of the parabola. Find the length of the side of the triangle.

[10] Conic Sections
Chapter: [10] Conic Sections
Concept: undefined >> undefined

Find `lim_(x -> 5) f(x)`, where f(x)  = |x| - 5

[12] Limits and Derivatives
Chapter: [12] Limits and Derivatives
Concept: undefined >> undefined

Suppose f(x)  = `{(a+bx, x < 1),(4, x = 1),(b-ax, x > 1):}`  and if `lim_(x -> 1) f(x) = f(1)` what are possible values of a and b?

[12] Limits and Derivatives
Chapter: [12] Limits and Derivatives
Concept: undefined >> undefined

Rewrite the following statement with “if-then” in five different ways conveying the same meaning.

If a natural number is odd, then its square is also odd.

[1] Mathematical Reasoning
Chapter: [1] Mathematical Reasoning
Concept: undefined >> undefined

Write the contrapositive and converse of the following statements.

If x is a prime number, then x is odd

[1] Mathematical Reasoning
Chapter: [1] Mathematical Reasoning
Concept: undefined >> undefined

Write the contrapositive and converse of the following statements.

It the two lines are parallel, then they do not intersect in the same plane.

[1] Mathematical Reasoning
Chapter: [1] Mathematical Reasoning
Concept: undefined >> undefined

Write the contrapositive and converse of the following statements.

Something is cold implies that it has low temperature.

[1] Mathematical Reasoning
Chapter: [1] Mathematical Reasoning
Concept: undefined >> undefined

Write the contrapositive and converse of the following statements.

You cannot comprehend geometry if you do not know how to reason deductively.

[1] Mathematical Reasoning
Chapter: [1] Mathematical Reasoning
Concept: undefined >> undefined

Write the contrapositive and converse of the following statements.

x is an even number implies that x is divisible by 4

[1] Mathematical Reasoning
Chapter: [1] Mathematical Reasoning
Concept: undefined >> undefined

Write each of the following statement in the form “if-then”.

You get a job implies that your credentials are good.

[1] Mathematical Reasoning
Chapter: [1] Mathematical Reasoning
Concept: undefined >> undefined

Write each of the following statement in the form “if-then”.

The Banana trees will bloom if it stays warm for a month.

[1] Mathematical Reasoning
Chapter: [1] Mathematical Reasoning
Concept: undefined >> undefined

Write each of the following statement in the form “if-then”.

A quadrilateral is a parallelogram if its diagonals bisect each other.

[1] Mathematical Reasoning
Chapter: [1] Mathematical Reasoning
Concept: undefined >> undefined
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