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

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Prove the following by using the principle of mathematical induction for all n ∈ N

1.3 + 3.5 + 5.7 + ...+(2n -1)(2n + 1) = `(n(4n^2 + 6n -1))/3`
[6] Principle of Mathematical Induction
Chapter: [6] Principle of Mathematical Induction
Concept: undefined >> undefined

Prove the following by using the principle of mathematical induction for all n ∈ N: 1.2 + 2.22 + 3.22 + … + n.2n = (n – 1) 2n+1 + 2

[6] Principle of Mathematical Induction
Chapter: [6] Principle of Mathematical Induction
Concept: undefined >> undefined

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Prove the following by using the principle of mathematical induction for all n ∈ N: `1/2 + 1/4 + 1/8 + ... + 1/2^n = 1 - 1/2^n`

 
[6] Principle of Mathematical Induction
Chapter: [6] Principle of Mathematical Induction
Concept: undefined >> undefined

Prove the following by using the principle of mathematical induction for all n ∈ N

`1/2.5 + 1/5.8 + 1/8.11 + ... + 1/((3n - 1)(3n + 2)) = n/(6n + 4)`
[6] Principle of Mathematical Induction
Chapter: [6] Principle of Mathematical Induction
Concept: undefined >> undefined

Prove the following by using the principle of mathematical induction for all n ∈ N

1/1.2.3 + 1/2.3.4 + 1/3.4.5 + ...+ `1/(n(n+1)(n+2)) = (n(n+3))/(4(n+1) (n+2))`
[6] Principle of Mathematical Induction
Chapter: [6] Principle of Mathematical Induction
Concept: undefined >> undefined

Prove the following by using the principle of mathematical induction for all n ∈ N

`a + ar + ar^2 + ... + ar^(n -1) = (a(r^n - 1))/(r -1)`
[6] Principle of Mathematical Induction
Chapter: [6] Principle of Mathematical Induction
Concept: undefined >> undefined

Prove the following by using the principle of mathematical induction for all n ∈ N

(1+3/1)(1+ 5/4)(1+7/9)...`(1 + ((2n + 1))/n^2) = (n + 1)^2`

 
[6] Principle of Mathematical Induction
Chapter: [6] Principle of Mathematical Induction
Concept: undefined >> undefined

Prove the following by using the principle of mathematical induction for all n ∈ N

`(1+ 1/1)(1+ 1/2)(1+ 1/3)...(1+ 1/n) = (n + 1)`

[6] Principle of Mathematical Induction
Chapter: [6] Principle of Mathematical Induction
Concept: undefined >> undefined

Prove the following by using the principle of mathematical induction for all n ∈ N

`1^2 + 3^2 + 5^2 + ... + (2n -1)^2 = (n(2n - 1) (2n + 1))/3`
[6] Principle of Mathematical Induction
Chapter: [6] Principle of Mathematical Induction
Concept: undefined >> undefined

Prove the following by using the principle of mathematical induction for all n ∈ N

`1/1.4 + 1/4.7 + 1/7.10 + ... + 1/((3n - 2)(3n + 1)) = n/((3n + 1))`

[6] Principle of Mathematical Induction
Chapter: [6] Principle of Mathematical Induction
Concept: undefined >> undefined

Prove the following by using the principle of mathematical induction for all n ∈ N

`1/3.5 + 1/5.7 + 1/7.9 + ...+ 1/((2n + 1)(2n +3)) = n/(3(2n +3))`
[6] Principle of Mathematical Induction
Chapter: [6] Principle of Mathematical Induction
Concept: undefined >> undefined

Prove the following by using the principle of mathematical induction for all n ∈ N: `1+2+ 3+...+n<1/8(2n +1)^2`

[6] Principle of Mathematical Induction
Chapter: [6] Principle of Mathematical Induction
Concept: undefined >> undefined

Prove the following by using the principle of mathematical induction for all n ∈ Nn (n + 1) (n + 5) is a multiple of 3.

[6] Principle of Mathematical Induction
Chapter: [6] Principle of Mathematical Induction
Concept: undefined >> undefined

Prove the following by using the principle of mathematical induction for all n ∈ N: 102n – 1 + 1 is divisible by 11

[6] Principle of Mathematical Induction
Chapter: [6] Principle of Mathematical Induction
Concept: undefined >> undefined

Prove the following by using the principle of mathematical induction for all n ∈ Nx2n – y2n is divisible by x y.

[6] Principle of Mathematical Induction
Chapter: [6] Principle of Mathematical Induction
Concept: undefined >> undefined

Prove the following by using the principle of mathematical induction for all n ∈ N: 32n + 2 – 8n– 9 is divisible by 8.

[6] Principle of Mathematical Induction
Chapter: [6] Principle of Mathematical Induction
Concept: undefined >> undefined

Prove the following by using the principle of mathematical induction for all n ∈ N: 41n – 14n is a multiple of 27.

[6] Principle of Mathematical Induction
Chapter: [6] Principle of Mathematical Induction
Concept: undefined >> undefined

Prove the following by using the principle of mathematical induction for all n ∈ N (2+7) < (n + 3)2

[6] Principle of Mathematical Induction
Chapter: [6] Principle of Mathematical Induction
Concept: undefined >> undefined

Find the multiplicative inverse of the complex number:

4 – 3i

[4] Complex Numbers and Quadratic Equations
Chapter: [4] Complex Numbers and Quadratic Equations
Concept: undefined >> undefined

Find the multiplicative inverse of the complex number.

`sqrt5 + 3i`

[4] Complex Numbers and Quadratic Equations
Chapter: [4] Complex Numbers and Quadratic Equations
Concept: undefined >> undefined
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