श्रेणी का 20 वाँ पद ज्ञात कीजिये-
2x4+4x6+6x8+.....+n पदों तक
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Rahul brainly par bhej do please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please
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