Class 9 Math – Exercise 1.3 | Set Notation and Forms | Fully Solved
Welcome to Smart Study Notes! Here you’ll find complete solutions to Class 9 Math Exercise 1.3 with simple explanations in Urdu and English. This exercise covers different forms of set representation.
π Topics Included:
- Tabular Form (ΩΫΨ±Ψ³ΨͺΫ Ψ΄Ϊ©Ω)
- Descriptive Form (ΨͺΩΨ΅ΫΩΫ Ψ΄Ϊ©Ω)
- Set Builder Notation
- Element Checking using ∈ and ∉
π Sample Question:
Q1: Write the set A = {x : x is an even number less than 10} in tabular form. Solution:A = {2, 4, 6, 8} ---
π Urdu Explanation:
Tabular Form Ω
ΫΪΊ ΫΩ
ΨΉΩΨ§Ψ΅Ψ± (elements) Ϊ©Ω comma Ϊ©Ϋ Ψ³Ψ§ΨͺΪΎ curly brackets Ω
ΫΪΊ ΩΪ©ΪΎΨͺΫ ΫΫΪΊ، Ψ¬ΫΨ³Ϋ:
A = {1, 2, 3}
Descriptive Form Ω
ΫΪΊ ΫΩ
Ψ§ΩΩΨ§ΨΈ Ϊ©Ϋ Ψ°Ψ±ΫΨΉΫ Set Ϊ©Ω Ψ¨ΫΨ§Ω Ϊ©Ψ±ΨͺΫ ΫΫΪΊ، Ψ¬ΫΨ³Ϋ:
A = ΩΫ ΨͺΩ
Ψ§Ω
ΨΉΨ―Ψ― Ψ¬Ω 5 Ψ³Ϋ Ϊ©Ω
ΫΫΪΊ۔
Set Builder Form:
A = {x : x ∈ N, x < 5}
π§ Note:
Ψ§Ϊ―Ψ± Ψ³ΩΨ§Ω Ω ΫΪΊ "Write in set-builder form" Ϊ©ΫΨ§ Ψ¬Ψ§Ψ¦Ϋ ΨͺΩ ΫΫ format use Ϊ©Ψ±ΫΪΊ: {x : x ∈ N, condition}
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