1.6 Series

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[ PURE 1 ] 1) Arithmetic Sequence 2) Geometric Sequence 3) Sum to Infinity

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20 Terms

1
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What is an Arithmetic Sequence/Progression
Any sequence with a common difference (d) + or --
2
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What is a Geometric Sequence/Progression
Any sequence with a common ratio (r) \* or ÷
3
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What is “a”
First term
4
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What is “T1”
What is “T1”
a (First term)
5
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What is “n”
What is “n”
n = no of term
6
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What is the formula of Tn (nth term/last term) in an AP
What is the formula of Tn (nth term/last term) in an AP
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7
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Write the formula (AP)
Write the formula (AP)
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8
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What is the first step in solving an AP question
Convert any and every term into “a”, first term, and “d”, common difference
9
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What is the formula of n (AP)
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10
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What is Sn
What is Sn
Sum of n terms
11
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What is S1
What is S1
T1 = a = first term
T1 = a = first term
12
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What is the formula of Sn in an AP
What is the formula of Sn in an AP
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13
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What is the formula
What is the formula
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14
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What is the formula of Tn in an GP
What is the formula of Tn in an GP
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15
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Write the formula
Write the formula
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16
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What is the first step in solving a GP question
Convert any and every term into “a”, first term, and “r”, common ratio
17
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What is the formula of Sn in a GP
What is the formula of Sn in a GP
When r
When r<1
18
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What is the formula of Sn in a GP
What is the formula of Sn in a GP
When r>1
When r>1
19
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What is the sum to infinity
An infinite geometric sequence
20
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What is the formula for sum to infinity
What is the formula for sum to infinity
When

( -1 < r < 1 )
When

( -1 < r < 1 )