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B
150
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C
50
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D
100
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Solution
The correct option is C50 S=10+20+30+40+…+500
Since, we know that aman=am−n
When m=n, then amam=am−m=a0=1, where a is any real number except 0.
Hence, we get that 10=1 20=1 30=1 ⋮ 500=1