If a = 3, Find the Values of A2 and 2a. - Mathematics

If a = 3, find the values of a² and 2^a.

बेरीज

a² = (3)² = 3 × 3 = 9

2^a = (2)³ = 2 × 2 × 2 = 8

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Concept of Substitution

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पाठ 20: Substitution (Including Use of Brackets as Grouping Symbols) - Exercise 20 (A)

पाठ 20 Substitution (Including Use of Brackets as Grouping Symbols)
Exercise 20 (A) | Q 10

Fill in the blank, when:
x = 3, y = 6, z = 18, a = 2, b = 8, c = 32 and d = 0.

`"y"/"x"` = ...........

Find the value of 2a + 4b + 5c, when a = 5, b = 10 and c = 20

Find the value of 6m − 2n − 5p − 3q, when m = 20, n = 10, p = 2 and q = 9

If a = 3, b = 0, c = 2 and d = 1, find the value of 6a − 3b − 4c − 2d

Find the value of 3x³ – 4x² + 5x – 6, when x = − 1.

Fill in the blank:

5a + 4b + 4x − 2c = 4x − (...........)

Insert the bracket as indicated:

2x − y + 2z = 2z − (....................)

If x = 3, y = 2 and z = 1; find the value of 3x² − 5y²

If x = 3, y = 2 and z = 1; find the value of xy + y²z – 4zx

Multiply and then evaluate:

(x – 2y + z) and (x – 3z); when x = − 2, y = − 1 and z = 1.