Question

1) deduce the formula for the following situation
i) the value of an item decrease at a given rate per annum, over a fixed period of time. what is time final value ?
ii) the value of an item increases at a given rate over the first year and then at the same rate decreases the next year. What is the total amount of the item? ​

Answer 1

$\implies \frac{5}{2} \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \lgroup \: 78 + 6 \: \rgroup \\\\ \implies \: 2 \times 8 + 5 \times 2 \\\\ \implies \: 25 \times y \times 67 \\ \\ \\ \: \sf \: \qquad \: \bigstar \: {\underline{\underline{ghhjffffgghhhhh}}} \: \bigstar$