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Find the sum off first five …

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Find the sum off first five multiples of five

Posted by Suplex City ?? 7 years, 4 months ago

CBSE > Class 10 > Mathematics

2 answers

Sudhanshu Yadav 7 years, 4 months ago

5,10,15,20,25 Sn=n/2(2a(n-1)d) =5/2(2×5(5-1)×5) 5/2(10+20) 5/2×20 5×15 75

Nandeesh C 7 years, 4 months ago

75

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