Answers

2015-06-03T08:24:23+05:30
Given,
 a = 2
 d = a+d-a =7-2
    = 5
 According to the data:
 S10 = [2a + (n - 1)d] (10/2)
        = 2*2 + (10- 1) 5*5
        = 4+ (9*5)(5)
        = 49*5
        = 245
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answer was for sum... u found 10th term....
2015-06-03T08:25:31+05:30

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A = 2
d = 5
n = 10

Sn = [ 2 a + (n-1)d ] n/2
     = [ 2 * 2 + 9 * 5 ] 10/2
     = 49 * 5
      = 245
 
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