document.write( "Question 1051899: Hi. I need to solve this using formulas. Can you, please, show me the step by step process because I keep getting the wrong answer. Thank you! E10k, k starts with 51 ends with 100. \n" ); document.write( "
Algebra.Com's Answer #667351 by solver91311(24713)\"\" \"About 
You can put this solution on YOUR website!
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\n" ); document.write( "\n" ); document.write( "Calculate the first term. Calculate the last term. Add the two. Multiply the sum of the first and last terms by the number of terms. Divide the result by 2.\r
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\n" ); document.write( "\n" ); document.write( "John
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\n" ); document.write( "My calculator said it, I believe it, that settles it
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