find the sum of all multiples of 7 lie between 500 & 900
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Multiples of 7 lying b/w 500-900 are: 504,511,518,525....896
a=504, an = 896, d=7
Sn=n/2(2a+(n-1)d)
=392/2(2*504+(392-1)7)
=166(1008+391*7)
=166(1008+2737)
=166(3745)
=621670
a=504, an = 896, d=7
Sn=n/2(2a+(n-1)d)
=392/2(2*504+(392-1)7)
=166(1008+391*7)
=166(1008+2737)
=166(3745)
=621670
abhiachu:
can u ans me 4 some other quests?
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