Wednesday

March 4, 2015

March 4, 2015

Posted by **Riana** on Tuesday, January 1, 2013 at 11:11pm.

- math -
**Steve**, Tuesday, January 1, 2013 at 11:15pmthe difference between T10 and T20 is 10d. So, 10d=710-34=676

d=67.6

T25=T20+5d = 710+338=1048

- math -
**Riana**, Tuesday, January 1, 2013 at 11:17pmthe answer is t25=79

and it sum of 20th term that is S20=710.

- math -
**Steve**, Wednesday, January 2, 2013 at 5:07amyou cannot have the "sum of the 20th term".

If you mean the sum of the 1st 20 terms, then

T10 = a+9d=34

S20 = 10(2a+19d) = 710

so, a=7, d=3

T25 = 7+24*3 = 79

**Answer this Question**

**Related Questions**

math help! - the 10th term is 34 of arithmetic series and the sum of the 20th ...

math - the 10th term of an arithmetic series is 34, and the sum of the first 20 ...

Math - The 10th term of an arithmetic series is 34, and the sum of the first 20 ...

Math-Gr.11 urgent - The 10th term of an arithmetic series is 34, and the sum of ...

arithmetic - the sum of the 3rd and the 4th term is 44 and the sum of the 10th ...

arithmetic - given that the first term of an Ap is 7 and its 10th term is twice ...

Maths - 1) In the arithmetic progression, the 8th term is twice the 4th term and...

arithmetic progression - the 9th term of an AP is 52 while the 12th term is 70. ...

arithmetic - Each term of a progression is determined by adding 0.5 to the ...

Math - The sum of the first seventeen terms of an arithmetic series is 493 The ...