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If P = {X: 7x — 4 > 5x + 2, X ∈ R} and Q = {X: X — 19 ≥ 1 — 3x, X ∈ R}, Find the Range of Set P ∩ Q and Represent It on a Number Line. - ICSE Class 10 - Mathematics

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Question

If P = {x: 7x — 4 > 5x + 2, x ∈ R} and Q = {x: x — 19 ≥ 1 — 3x, x ∈ R}, find the range of set P ∩ Q and represent it on a number line.

Solution

P = {x : 7x - 4 > 5x + 2, x ∈ R}

7x - 4 > 5x + 2

7x - 5x > 2 + 4

2x > 6

x > 3

Q = {x : x - 19 >= 1 - 3x, x ∈  R}

`x - 19 >= 1 - 3x`

`x + 3x >= 1 + 19`

`4x  >= 20`

`x >= 5`

P ∩ Q = `{x : x >= 5, x ∈ R}`

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Solution If P = {X: 7x — 4 > 5x + 2, X ∈ R} and Q = {X: X — 19 ≥ 1 — 3x, X ∈ R}, Find the Range of Set P ∩ Q and Represent It on a Number Line. Concept: Representation of Solution on the Number Line.
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