An arithmetic progression has first term 10 and common difference .

MATHEMATICS · Multi-part · CBSE · Mathematics · Arithmetic Progressions · Arithmetic Progressions

Problem

An arithmetic progression has first term 10 and common difference

-2

. (i) Obtain the expression for its

n

th term. (ii) Find the value of

n

for which the term equals 6. (iii) Determine how many terms of the progression are positive.