2.6.10+4.12.20+….+20.60.100/1.2.3+2.4.6+…+10.20.30.help me

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1.   2.6.10+4.12.20+….+20.60.100/1.2.3+2.4.6+…+10.20.30

   = 2.6.10(1+2+3+…+10)/1.2.3(1+2+3+…+10) 

   = $\frac{2.6.10}{1.2.3}$ 

   = $\frac{2.6.10}{1.6}$ 

   = $\frac{2.10}{1}$ 

   = $\frac{20}{1}$ 

   = 20

    

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