F.1 maths question
2007-01-07 9:01 pm
Use an algebraic expression to represent the general term of the sequence -8,-5,-2,1,4.............
回答 (3)
2007-01-08 9:13 pm
The answer is n+3
2007-01-08 8:48 pm
The Formula is:
Arithmetic Sequence: First Term + Common Difference x (n – 1)
Geometric Sequence: First Term x Common Ratio^ (n - 1)
And this sequence is an Arithmetic Sequence.
The General Term:
-8 + 3 x (n – 1)
= -8 + 3n – 1
= -7 + 3n
I am sure it is right!!!
2007-01-08 12:49:31 補充：
Sorry!I type Wrong!!!!The answer is -9 + 3n
Arithmetic Sequence: First Term + Common Difference x (n – 1)
Geometric Sequence: First Term x Common Ratio^ (n - 1)
And this sequence is an Arithmetic Sequence.
The General Term:
-8 + 3 x (n – 1)
= -8 + 3n – 1
= -7 + 3n
I am sure it is right!!!
2007-01-08 12:49:31 補充：
Sorry!I type Wrong!!!!The answer is -9 + 3n
參考: myself
2007-01-07 9:08 pm
-8,-5,-2,1,4.....
佢o地o既common difference係3
T(n)=a+(n-1)d
so..T(n)=-8+(n-1)3
=3n-11
general term of the sequence: 3n-11
佢o地o既common difference係3
T(n)=a+(n-1)d
so..T(n)=-8+(n-1)3
=3n-11
general term of the sequence: 3n-11
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