T18=7 and T7=18 obtain T25
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Answered by
1
Answer:
Step-by-step explanation:
T18=7
a+17d=7. eq1
T7=18
a+6d=18. eq2
From 1 and 2
d=-1
a=24
T25=a+24d
= 24 +24(-1)
= 0
Answered by
0
d=7-18/18-7
=-11/11
=-1
hence
t7=a+(n-1)d
18=a-6
a=24
hence
t25=24+24(-1)
=24-24=0
=-11/11
=-1
hence
t7=a+(n-1)d
18=a-6
a=24
hence
t25=24+24(-1)
=24-24=0
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