MATHEMATICS PROBLEM SOLVER

It is a site for parents, students and teachers. This site can help O-LEVEL or GCSE secondary school students in mastering mathematics subject. It intends to involve the learners by making them follow up the examples before they can do questions on their own at the TRY THIS.... section. There are some videos, tests, quizzes and past examination questions. Learning the examples will ultimately give students the required confidence in solving various questions in mathematics.

Monday 23 March 2015

ARITHMETIC PROGRESSION 1

The 1st term of an A.P. is 40 and the common difference is 58. Find the 12th term.

Solution

A₁= 40, d = 58

A_n = A₁ + (n-1)d [ formula for n terms ]

A₁₂ = A₁ + (12-1)d

A₁₂ = A₁ + 11d [ formula for 12 terms ]

A₁₂ = 40 + (11 x 58)

A₁₂ = 40 + 638

A₁₂ = 678

Hence the 12th term is 678.

TRY THIS...................

The 1st term of an A.P. is 456 and the common difference is 70. Find the 12th term.

MATHEMATICS PROBLEM SOLVER

Monday 23 March 2015

ARITHMETIC PROGRESSION 1

No comments:

Post a Comment