A sequence
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www.iPracticeMath.com provides best Math help for every topic. This presentation shows Sum of the first n terms of a sequence. Welcome to join us at: http://www.facebook.com/iPracticeMath
Transcript of A sequence
A sequence is a collection of numbers arranged in a definite order
according to some definite rule
Each number in the sequence is called a term of the sequence.
The number in the first position the first term is
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The number in the second position the second term
The number in the third position the third term
Sum of the first n terms of a sequence
=
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= +
= + +
= + + + … +
Sum of the first n terms of a sequence
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- =
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Find the first four terms of the sequence whose ‘ ‘ term is 3n + 1.
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Here = 3n + 1
For n = 1, = 3 × 1 + 1 =4.
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For n = 2, = 3 × 2 + 1 = 7.
For n = 3, = 3 × 3 + 1 = 10.
For n = 4, = 3 × 4 + 1 = 13.
The first four terms of the sequence are 4, 7, 10, 13.
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