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January 27, 2015

January 27, 2015

Posted by **festus** on Wednesday, March 7, 2012 at 3:46am.

- maths -
**Steve**, Wednesday, March 7, 2012 at 12:25pmwhat don't you get?

T4 = a+3d

T6 = a+5d

a+3d + a+5d = 42

2a + 8d = 42

a+4d = 21

T3 = a+2d

T9=a+8d

a+2d + a+8d = 52

2a + 10d = 52

a+5d = 26

a+4d = 21

a+5d = 26

d = 5

so a=1

sum of T1-T10 = 10/2(1+46) = 235

AP = 1 6 11 16 21 26 31 36 41 46 . . .

- maths -
**Terfa sakaa**, Sunday, October 14, 2012 at 4:16amAnswer

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