definitions

Parin Sir > definitions

May

Roster Method ( Listing Method ) : Under this method, we just make a list of the objects of the set and put them within braces { }.

e.g. (i) If A is set of first five prime numbers, then A = { 2, 3, 5, 7,…

Posted in: How to describe or specify a set ?,

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May

Set Theory and Function

Set : A well defined collection of objects is called a set.

The objects in a set are called its elements or members.

$\dpi{150}... </p> <div class=$

Posted in: Set - Theory,

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May

Examples(2)

(8) What is the least number which is divisible by 2, 5, 6 and 9 and at the same time a perfect square ?

Soln. [ 2, 5, 6, 9 ] = LCM of 2, 5, 6 and 9 = 2 $\times$

Posted in: Examples(2),

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May

Examples

(1) What is the value of $\left (\frac{243}{32} \right )^{\frac{-4}{5}}$ ?

Soln. …

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May

Types of Surds

■ Pure Surd : A surd which consists wholly of an irrational number is called a pure surd.

e.g. $\sqrt{6}$ ,

Posted in: Types of Surds,

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May

Arithmetical Progression (A.P.)

■Arithmetical Progression (A.P.) : If each term of a progression differs from its preceding term by a constant, then such a progression is called an arithmetical progression. This constant difference is known as common differen…

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May

Surd

Surds : We know that $\sqrt{2}$ , $\sqrt{3}$ ,

Posted in: Surd,

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May

Surds & Indices

Indices : we know that 2 $\times$ 2 = 2², 2 $\times$ 2

Posted in: Surds & Indices,

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May

Examples

(1) Evaluate : (i) $\sqrt{45}\times\sqrt{20}$ (ii) .

Posted in: Examples,

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