+1+2+3+4+5+6+7+8+7+6+5+4+3+2+1=?
a)82 b) 92 c) 65 d)81
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1
Answer:
1+2+3+4+5+6+7+8+7+6+5+4+3+2+1=?
a)82 b) 92 c) 65 d)81
what we do
Answered by
1
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(1+1)+(2+2)+(3+3)+(4+4)+(5+5)+(6+6)+(7+7)+8
2+4+6+8+10+12+14+8
30+20+14
50+14
64
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