Seventh teen of an Ap is 7
17th teem is - 34 finds
teem 25 terms
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Seventh teen of an Ap is 7
17th teem is - 34 finds
teem 25 terms
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Answer:
HELLO♥
t7= 7 , t17= -34
t7 = a+(n-1) d
7 = a+6d
a+6d = 7 ..(1)
t17= a+(n-1) d
-34.= a + 16d
a+16d = -34 ..(2)
subtract equ 2) from 1)
a+6d = 7
a+16d = -34 .
- - +
----------------
-10d = 41
d = 41/-10= -4.1
put d = - 4.1 in equ 1)
a+6d = 7
a+ 6(-4.1) = 7
a = 7- 24.6
a = -17.6
HOPE IT HELPS U