In an AP the first term is 25 nth term is -17 and sum of first n terms

1.	In an AP the first term is 25 nth term is -17 and sum of first n terms is 60.find the AP
Answer» a=25,, an=-17,sn=6025+(n-1)d=-1725+dn-d=-17Dn-d=-17-25Dn-d=42 eq1Sn=60N/22a+(n-1)d=60N/225+(n-1)d=6050n+dn²-dn=120Dn²-49d=120Solve it then other equation will be formed then use elimination or substitutions method of linear equation to get common difference and get ur AP AP IS 25,22,19,16,13,10d=-3 n=15

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