Question 98329: hello math lovers...
i would like to thank our generous math tutors for helping me
to understand our lessons and homework...
by the way,
i just wanna ask for your help...
in our home work...we need to write the first five terms of the
arithmetic sequence whose nth term is given...
and for example the given are:
An=9+(n-1)4
An=7+(n-1)(-2)
An=-4+(n-1)3
An=-2+(n-1)(-3)
How can i solve these problems which have different signs..
with a negative & positive sign...
but the problem is that i have no idea on how to solve these problems...
can you help me? so i can understand it better and i can solve our exercises that are from our teacher....
can you explain it to me on how to get the answer or on how to solve these problem... your help or responce is very appreciated...
Answer by 303795(602)   (Show Source):
You can put this solution on YOUR website! An=9+(n-1)4
To find the first five terms substitute 1, 2, 3, 4 then 5 into the equation in order to find the terms.
eg
A1=9+(1-1)4=9+0x4=9+0=9
A2=9+(2-1)4=9+1x4=9+4=13
A3=9+(3-1)4=9+2x4=9+8=17
A4=9+(4-1)4=9+3x4=9+12=21
A5=9+(5-1)4=9+4x4=9+16=25
The first five terms are 9, 13, 17, 21 and 25.
An=7+(n-1)(-2)
A1=7+(1-1)(-2)=7+0x(-2)=7+0=7
A2=7+(2-1)(-2)=7+1x(-2)=7+(-2)=5
A3=7+(3-1)(-2)=7+2x(-2)=7+(-4)=3
A4=7+(4-1)(-2)=7+3x(-2)=7+(-6)=1
A5=7+(5-1)(-2)=7+4x(-2)=7+(-8)=-1
The first five terms are 7, 5, 3, 1, -1
Use the same procedure in each of the other sequences.
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