Plz tell ques 12 ......
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Use the ap formula which is 2b = a+ c and then solve normally
Kanayan:
Actually I hv applied, I am stuck somewhere after this so could you explain further ?
okay wait
Yeah plz
?????
im stucl at the last equaton which is n^2 -9n + 38 which will not give an integral root. And in combinations, only positive integral roots are allowed. So im stuck here.
stuck*
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