The sum of 5th and 9th terms of A.P.
is 72 and the sum of 7th and 12th terms
is 97. Find the A.P.
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Answer:
A.P.=6,11,16,21,...
Step-by-step explanation:
t5+t9=72
t7+t12=97
a+4d+a+8d=72
a+6d+a+11d=97
2a+12d=72
2a+17d=97
-5d=-25
so,d=5
2a+12(5)=72
a=6
A.P.=6,11,16,21,....
HOPE THIS HELPS!
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