In an AP, if the common difference (d) -4, and the seventh term (a.,) – InterviewSolution

1.	In an AP, if the common difference (d) -4, and the seventh term (a.,) is 4, then find thefirst term.вС ~ Δ PQRt.afPQ=t.ที่ไ er-m Δ PQR羽ar Δ ABC3, then find ar Δ PQRADven Δ ABC ~ Δ POR, if=
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