CBSEi Class 10 Sequences (AP and GP) CORE

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3. Find the sum of first n odd natural numbers. First n odd natural numbers are : …………. First term =……….. Common difference=…………. 4. Find the sum of 20 terms of the A.P. -5, 0, 5, 10 … First term = …….. Common difference =……… Formula used =……………. 5. In an A.P. if the 5 th and 12 th terms are 30 and 65 respectively, find the sum of first 25 terms. a5 = ………. a12 = ……….. How will you find a and d? 115
6. Find the sum of all even numbers between 0 and 1000. Even numbers between 0 and 1000……………. How many are these? ............. 7. Find the sum of all natural numbers between 300 and 700, which are exactly divisible by 7. Natural numbers between 300 and 700 which are exactly divisible by 7 are : ………………………. How many are they? First term =……….. Last term =…………. Formula for finding sum is Sn = 8. Find the sum of first 40 terms of an A.P., whose second term is 2 and seventh term is 22. 116
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CBSE-i Mathematics Arithmetic Progr
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The CBSE-International is grateful
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ACKNOWLEDGEMENTS Advisory Conceptua
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CContent Worksheet CW7 22 General T
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Introduction to Arithmetic Syllabus
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Mozart the finest musician of the w
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Teacher’s Note The teaching of Ma
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ealise that if general term is give
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Activity skill Matrix Activity Skil
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Activity 1 - Warm Up (W1) Recognisi
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Activity 3 - Warm Up (W3) Designs a
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Activity 5 - Pre Content (P2) Visua
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Activity 7 - Content (CW2) Recognis
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Activity 9 - Content (CW4) Problems
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Specific objective: To recognise a
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Activity 13 - Content (CW8) Problem
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Activity 15 - Content (CW10) Hands
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Activity 17 - Post Content (PCW1) A
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Able to write general term when any
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Teachers’ Rubric for Summative As
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Able to find the sum of given numbe
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STUDY MATERIAL 35
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(v) (vi) Area of 3 rd square = = ,
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(vi) Area of fourth square = Simila
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(iii) 1, 2, 4, 8, ______________ (i
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(ii) 54 = 54 18 = = 54 3 6 = = 18 3
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The fixed number is called the comm
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- = = = = Thus, it is not an AP (Wh
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is called the general term of an AP
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or, 185 = 40 + 25n 25 or, 25n = 250
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The fixed number is called the comm
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Here a = 2 6 ( 2) = 3 18 ( 6) = 3 5
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Example 18 : Find 8 th term of the
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or, = or, a = = i.e., the first ter
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Thus, the sum of first n terms of a
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Sn = [2a + (n 1)d] S50 = [2x1 + (50
Page 74 and 75: Example 28: The sum of first 22 ter
Page 76 and 77: Student’s Worksheet 1 Warm up (W1
Page 82 and 83: Student’s Worksheet 4 Pre Content
Page 84 and 85: Student’s Worksheet 5 Pre Content
Page 86 and 87: Student’s Worksheet 6 Content Wor
Page 88 and 89: Parameters of assessment Self Asses
Page 90 and 91: 2. Investigation : For which of the
Page 94 and 95: 2. Which of the following expressio
Page 98 and 99: 5. Given a sequence 6, 11, 16, 21,
Page 100 and 101: 11. 12. Can Can 91
Page 102 and 103: Student’s Worksheet 10 Content Wo
Page 104 and 105: Step 6 Take the strip of dimension
Page 106 and 107: Parameters of assessment Self Asses
Page 108 and 109: a 3. Take the suitable value for fi
Page 114 and 115: 5. Find a G.P. whose 3 rd and 6 th
Page 118 and 119: 5. Visit the link http://betterexpl
Page 122 and 123: Self Assessment Rubric 15 Content W
Page 126 and 127: 9. Find the sum of all odd integers
Page 128 and 129: PCW1 (Assignment) : Post Content Wo
Page 130 and 131: 5. General term of an A.P. is alway
Page 132 and 133: PCW4 Framing questions Using the gi
Page 134 and 135: PCW5 Hands on activity Aim: To veri
Page 136 and 137: Suggested videos and Extra readings
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CBSEi Class 10 Sequences (AP and GP) CORE

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