Posted by Sequence and series on Saturday, November 26, 2011 at 9:20am.
The 4th term of an A.P.is 37 and the 6th term is 12 more than the 4th term.find the 1st and the 7th term of the sequence.
Core mathematics - Reiny, Saturday, November 26, 2011 at 9:44am
4th term is 37 ---> a + 3d = 37
6th term is 12 more than 4th term ---> a+5d = a+3d + 12
2d = 12
d = 6
then in a+3d = 37
a + 18 = 37
a = 19
first term is 19
7th term = a+6d = 127
19 25 31 37 43 49
is 4th term 37 ? yes
is 6th term 12 more than 4th? yes
Core mathematics - angel, Saturday, November 26, 2011 at 9:44am
1 = 6.16 and 7= 43.12
Core mathematics - angel, Saturday, November 26, 2011 at 9:45am
Core mathematics - angel, Saturday, November 26, 2011 at 9:47am
Reiny can u answer my other question please it is the latest one about the charity swim
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