Question
the fifth term of an arithmetic progression is 19,and the fourteenth term is 55. Find its first term
Answers
Reiny
"the fifth term of an arithmetic progression is 19"
----> a+4d = 19
" the fourteenth term is 55"
----> a+13d=55
subtract the two equations:
9d = 36
d = 4
in a+13d = 55
a + 13(4) = 55
a = 3
----> a+4d = 19
" the fourteenth term is 55"
----> a+13d=55
subtract the two equations:
9d = 36
d = 4
in a+13d = 55
a + 13(4) = 55
a = 3
Yetunde
Correct