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The 14th term of an Ap is double the 4th term.find the 10th term if the 2nd term is 8
Answers
Answered by
Reiny
2nd term = 8 ----> a+d = 8 , #1
14th term is double the 4th term
a+13d = 2(a+3d)
a+13d = 2a + 6d
a - 7d = 0 , #2
#1 - #2:
8d = 8
d = 1
then a=7
term 10 = a+9d = 7 + 9 = 16
14th term is double the 4th term
a+13d = 2(a+3d)
a+13d = 2a + 6d
a - 7d = 0 , #2
#1 - #2:
8d = 8
d = 1
then a=7
term 10 = a+9d = 7 + 9 = 16
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