Question

Write the first three terms of the GP whose first term and the common ratoo are given below 1) a=1000, r=2/5

Answer 1

Answer: 1000,400,160

Step-by-step explanation:

a = 1000 , r= 2/5

now aⁿ = arⁿ⁻¹

so,

a¹$= 1000$

a² = $1000$ x $\frac{2}{5}$ $= 400$

a³$= 1000 X (\frac{2}{5})^2 = 1000 X \frac{4}{25} = 40 X 4 =160$