The sum of the 3rd and 7th term of an AP is 38 and the 9th term is 37. Find the AP.
4 answers
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Just translate into Math
"The sum of the 3rd and 7th term of an AP is 38 "
---> a+2d +a+6d = 38
2a + 8d = 38
a + 4d = 19 **
"the 9th term is 37" ---> a + 8d = 37 ***
subtract ** from ***
4d = 18
d = 9/2
sub into ** to get a , then form the terms
"The sum of the 3rd and 7th term of an AP is 38 "
---> a+2d +a+6d = 38
2a + 8d = 38
a + 4d = 19 **
"the 9th term is 37" ---> a + 8d = 37 ***
subtract ** from ***
4d = 18
d = 9/2
sub into ** to get a , then form the terms
what are the terms
Good
3 answers