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Arithmetic Sequences finding the value of a+d.

TriciaDelicia · 2010-02-07 14:01:36

T1+T5=0 T13=20 Find the value of a and the value of d. Could somebody show me how this one is done. It's wrecking my head and I know it's something really simple that I'm doing wrong. Thank you in advance for the help.:)

07-02-2010 2:01pm

#1

TriciaDelicia

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Join Date: October 2008

Posts: 92

T1+T5=0
T13=20
Find the value of a and the value of d.

Could somebody show me how this one is done.
It's wrecking my head and I know it's something really simple that I'm doing wrong.
Thank you in advance for the help.:)

0

Comments

#2 07-02-2010 2:27pm

RolandIRL

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Posts: 11421

if Tn is the general term, Tn= a + (n-1)d
now subsitute this in T1, T5, T13, and solve

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