14
Feb
14
Feb
Class 9 | Chapter 1 | Number System | Example 16
Example 16: Simplify the following expressions: (i) (5+ √7)(2+ √5) (ii) (5+ √5)(5− √5) (iii) (√3+ √7)2 (iv) (√11− √7)(√11+ √7) Example 12, 13, 14, 15 Example 17
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14
Feb
Class 9 | Chapter 1 | Number System | Example 12, 13, 14, 15
Example 12: Check whether 7 √5, 7/√5 , √2 +21, π − 2 are irrational numbers or not. Example 13: Add 2√2+5√3 and √2–3√3. Example 14: Multiply 6√5 by 2√5. Example 15: Divide 8√(15) by 2√3. Example 11 Example 16
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14
Feb
Class 9 | Chapter 1 | Number System | Example 11
Example 11: Visualize the representation of 5.373737… on the number line upto 5 decimal places, that is, up to 5.37777. Example 10 Example 12, 13, 14, 15
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14
Feb
Class 9 | Chapter 1 | Number System | Exercise 1.6 | Question 2 & 3
Question 2: Find: (i) 93/2 (ii) 322/5 (iii) 163/4 (iv) 125-1/3 Question 3: Simplify: (i)22/3⋅21/5 (ii)(1/33)7 (iii)(111/2) / (111/4) (iv)71/2⋅81/2 Question 1 Class 9 | Home
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14
Feb
Class 9 | Chapter 1 | Number System | Exercise 1.5 | Question 5
Question 5: Rationalise the denominators of the following:(i) 1/√7 (ii)1/(√7−√6) (iii) 1/(√5+ √2) (iv) 1/(√7−2) Question 4 Ex: 1.6 | Question 1
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14
Feb
Class 9 | Chapter 1 | Number System | Exercise 1.5 | Question 3
Question 3: Recall, π is defined as the ratio of the circumference (say c) of a circle to its diameter (say d). That is, π = c / d⋅ This seems to contradict the fact that π is irrational. How…
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14
Feb
Class 9 | Chapter 1 | Number System | Exercise 1.5 | Question 2
Question 2: Simplify each of the following expressions: (i) (3+ √3)(2+ √2) (ii) (3+ √3)(3− √3) (iii) (√5+ √2)² (iv) (√5− √2)(√5+ √2) Question 1 Question 3
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