Posted by noor on Tuesday, February 28, 2012 at 10:51am.
T10 = a+9d
T15 = a+14d
10(a+9d) = 15(a+14d)
10a + 90d = 15a + 210d
5a = -120d
a = -24d
T25 = a + 24d = -24d + 24d = 0
Related Questions
Maths - The 3rd term of an AP is 10 more than the first term while the fifth ...
arithmetic - if 6 times the sixth term is equal to 15 times the fifteenth term ,...
Arithmetic Progression - In an AP the 6th term is half the 4th term and the 3rd ...
math - The 4th term of an AP is 3 times its first term and the 7 term exceeds ...
Algebra - Which statement describes how to find the nth term in the sequence? 15...
maths - if the seventh term of an AP is zero,prove that its 27th term is five ...
arithmetic - In an arithmetic progression the sum of the first 10 terms is 50 ...
Arithmetic Sequence - Given the third term of an arithmetic sequence less than ...
Sequence - Find the common difference and a formula formula for the nth term of ...
math - In an AP, the thirteenth term is 27, and the seventh term is three times ...
For Further Reading
