TheMathsTutor works out the answer to the question.

TheMathsTutor works out the answer to the question

TheMathsTutor works out the answer to the question.

TheMathsTutor works out the answer to the question

TheMathsTutor works out the answer to the question.

TheMathsTutor works out the answer to the question.

How many terms are in the sequence, if you're given the first few terms and the last term? Solve for "n" in the sequence equation. I also show a shortcut, using logs.

A level maths tutorial. Also suitable for leaving cert.

A level maths tutorial. Also suitable for leaving cert.

How to find the sum of an infinite geometric series. Note: All Khan Academy content is available for free at (www.khanacademy.org)

Formula & tutorial on finite geometric series. Note: All Khan Academy content is available for free at (www.khanacademy.org)

More free lessons at: http://www.khanacademy.org/video?v=dIGLhLMsy2U Note: All Khan Academy content is available for free at (www.khanacademy.org)

Nice introduction to arithmetic sequences. More free lessons at: http://www.khanacademy.org/video?v=_cooC3yG_p0 Note: All Khan Academy content is available for free at (www.khanacademy.org)

Introduction to the arithmetic and geometric series. Note: All Khan Academy content is available for free at (www.khanacademy.org)