Asked by Wale
The fourth term of an arithemetic progression is 13 and the tenth term is 31 find it first tern and it common difference
Answers
Answered by
Reiny
a+3d = 13
a+9d = 31
subtract them
6d = 18
d = 3
back into the 1st equation:
a + 9 = 13
a= 4
a+9d = 31
subtract them
6d = 18
d = 3
back into the 1st equation:
a + 9 = 13
a= 4
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