SOLUTION: Hi I need help with this math problem. -7+40 has to be arithmetic sequence, what are the first three terms? How can I solve this problem?

Question 896351: Hi I need help with this math problem. -7+40 has to be arithmetic sequence, what are the first three terms? How can I solve this problem?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Hi I need help with this math problem. -7+40 has to be arithmetic sequence, what are the first three terms? How can I solve this problem?
----------------------
a(4) = a(1) + 3d = -7
a(5) = a(1) + 4d = 40
------
Subtract and solve for "d"::
d = 47
----
Solve for "a(1)"::
a(1) + 3(47) = -7
a(1) = -148
-----
1st three terms:: -148, -148+47, -148+2(47)
=====
Ans: = -148, -101, -54
==========================
Cheers,
Stan H.
RELATED QUESTIONS
hello math lovers... i would like to thank our generous math tutors for helping me to... (answered by 303795)

How do I solve this problem? the first two terms of an arithmetic sequence are a(base1)=2 (answered by gonzo)

i really need help with this! i already got on tutor.com and didnt understand how they... (answered by ewatrrr)

Can somebody please help me out? I need help with sequence and series. Below is a problem (answered by Theo)

I have one last question on my homework and I can�t seem to figure it out. I�ll send the (answered by greenestamps,Theo,apshu)

I'm a high school student in Algebra 2. I have a couple questions, 1. what are the... (answered by stanbon)

I've got this problem (see below). I've worked through problems 1b - 1d, but I am stuck... (answered by stanbon)

yes! i need help with this problem the sum of two consecutive terms in the arithmetic... (answered by stanbon,robertb,jrfrunner)

The sum of the first n terms of an arithmetic squence is given by the formula; Sn= n/2... (answered by edjones)