document.write( "Question 647305: the sum of the first fifteen terms of an arithmetic terms progression is 270. find the first term and the common difference if the the fifteenth terms is 39. \n" ); document.write( "

Algebra.Com's Answer #406131 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi,
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document.write( "the sum of the first fifteen terms of an arithmetic terms progression is 270. 
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document.write( "find the first term and the common difference if the the fifteenth terms is 39
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document.write( " ⇒ ,  = -3
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document.write( "  ⇒ ⇒  d = 3
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document.write( "and
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document.write( "   \n" );
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