Prove that :S12=3 (S8-S4)

1.	Prove that :S12=3 (S8-S4)
Answer» http://www.smartlearning.in/new_stsquestion.php?QuestionID=22686&page=1Here u will get ur answer Regards #Shashankpandey Solve s12 with sn formulaThen solve s8 and se put the value in question . Answer is come

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