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for 2 nd question
given sn= 5n +4
to find 25th term
S25-S24 =a25
S25 = 5(25)+4 =129
S24=5(24)+4=124
a25=S25-S24=129-124=5
Sn=9n+6
S25=9(25)+6=231
S24=9(24)+6=222
a25=231-222=9
so the ratio of their 25 term is 5/9
given sn= 5n +4
to find 25th term
S25-S24 =a25
S25 = 5(25)+4 =129
S24=5(24)+4=124
a25=S25-S24=129-124=5
Sn=9n+6
S25=9(25)+6=231
S24=9(24)+6=222
a25=231-222=9
so the ratio of their 25 term is 5/9
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