Find the 20th term of arithmetic progressions, Mathematics

Find the 20th term from the end of the AP 3, 8, 13........253.

Ans:    3, 8, 13 .............. 253

Last term = 253 a20 from end

= l - (n-1)d

253 - ( 20-1) 5

253 - 95

= 158


Posted Date: 4/8/2013 5:15:45 AM | Location : United States

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