Friday

April 18, 2014

April 18, 2014

Posted by **John** on Monday, April 22, 2013 at 3:44pm.

- maths -
**Steve**, Monday, April 22, 2013 at 4:28pmwe know that 2+(n-1)d = 29, so

d = 27/(n-1)

sum of first n terms is

n/2 (4+(n-1)d)

n/2 (4+(n-1)*27/(n-1)) = 155

n = 10

check:

d = 27/9 = 3

10th term is 2+9(3) = 29

S10 = 5(4+9(3)) = 155

**Related Questions**

Maths - The 3rd term of an AP is 10 more than the first term while the fifth ...

Maths - Arithmetic Progression - The fourth term of an AP is 8 and the sum of ...

math - The 8th term of ap is 5time the 3rd term, while the 7th term is greater ...

math - The 4th term of an AP is 3 times its first term and the 7 term exceeds ...

Maths - The first term of an AP is 3 and the eleventh term is 18.find the number...

maths - the frst term of AP is 4 and the last term is 79.given that the sum of ...

Maths - The 14th term of an Ap is double the 4th term.find the 10th term if the ...

maths - If the pth term of an AP is q and the qth term is p, prove that its nth ...

maths - if the seventh term of an AP is zero,prove that its 27th term is five ...

maths - The thirteenth term of an arithmetic progrssion os 27 and the seventh ...