document.write( "Question 414395: I need to find the sum of 2+4+6+8+10+...+1020.\r
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Algebra.Com's Answer #290677 by ewatrrr(24785) $\"\"$ $\"About$

You can put this solution on YOUR website!


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document.write( "Hi
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document.write( "{2,4,6,8,10,...,1020} is an Arithmetic Sequence where difference between the terms = 2
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document.write( "   1020=2+(n-1)*2
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document.write( "    1018/2 = n-1
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document.write( "     509 + 1 = n
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document.write( "        510 = n   (1020 is the 510 term)  Note: 1020/2 = 510
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document.write( " = 255(1022) = 260,610
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