The sum of the first six terms of an arithmetic progression is 42.

The sum of the first six terms of an arithmetic progression is 42. The ratio of the 10th term to the 30th term is . Calculate the first and the thirteenth term.

Solution:

In an A.P., the sum of its first n terms is 6n – n². Find the 25th term.

Solution:

More Solutions:

• Find the values of a and below.
• Determine the matrices, find x.
• Find the matrix B if A [4 1 2 3] and A² = A + 2B
• Solve the matrix, compute (AB)C = (CB)A.
• Find the each of the following and state it they are equal (A + B)(A – B).
• If A = and A² = I, find x,y.