Question

If = a/b = 7/3, then find the values of the following ratios.

i. (5a + 3b)/(5a - 3b)

ii. (2a² + 3b²)/(2a² - 3b²)

iii. (a³ - b³)/b³

iv. (7a + 9b)/(7a - 9b)

Answer 1

Thus, (5a + 3b)/(5a - 3b) = 22 : 13

So, (a³ - b³)/b³ = (343 - 27)/27 ... [By dividendo]