SOLUTION: Find A1 and d for an arithmetic sequence with these terms: A4 = 9 A7 = 18

SOLUTION: Find A1 and d for an arithmetic sequence with these terms: A4 = 9 A7 = 18

Algebra.Com

Question 744976: Find A1 and d for an arithmetic sequence with these terms:
A4 = 9
A7 = 18
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
Only giving here two hints.

How many differences between A1 and A4? How many differences between A4 and A7?
Arithmetic Sequences depends on common difference between successive terms.
RELATED QUESTIONS
Find a1 and d for an arithmetic sequence with these terms: a4=9 and... (answered by richwmiller)

1) In an arithmetic sequence, a4=8 and a7=26. Find a1 and d. Write the first 5 terms of... (answered by mananth,ikleyn)

Given two terms of the arithmetic sequence, a7=12 and a10=-9, find a1 and... (answered by Fombitz)

For an arithmetic progression, a1, a2, a3,..... aN, if a4/a7=2/3, find a6/a8. (answered by greenestamps)

If the given terms are part of an arithmetic sequence, write a rule for the sequence,... (answered by josgarithmetic)

Find General term for (An) for arithmetic sequence where a1=13 and... (answered by josgarithmetic)

For the arithmetic sequence, find a12 and an, when a1=3 and a4=-12 (answered by Fombitz)

Find a1 for the arithmetic sequence:... (answered by stanbon)

1. Find the 25th term of the arithmetic sequence ‒7, ‒4, ‒1, 2, ... 2.... (answered by MathLover1,greenestamps)