Question

What is the 3rd term of the sequence? a1 = 40 and an = 0.5(an – 1) a3 =

Answer 1

$\bf \begin{array}{llll} term&value\\ \text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\ a_1&40\\\\ a_2&0.5(a_{n-1})\\ &0.5(a_{2-1})\\ &0.5(a_1)\\ &0.5(40)\\ &20\\\\ a_3&0.5(a_{3-1})\\ &0.5(a_2)\\ &0.5(20) \end{array}$