If the ratio of the sum of the first n terms of two A. PS is (7n+1):(4n+27), the find ratio of their 9th term?
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glad help you.
it helps you,
thank you ☻
@vaibhav246
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a = 7 = ? d= 7n+1 - 4n+27 = 10
an=a+n-1×d
7+n-1×10
70n
n=70 a9= 70
an=a+n-1×d
7+n-1×10
70n
n=70 a9= 70
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