Evaluate the expression 120rn 1r 1 when r 06 and n 4 Ans

Evaluate the expression 120(r^n - 1)/r - 1 when r = 0.6 and n = 4. Answer: 12.89 -38.88 23.25 261.12 -175.08

Solution

Given that

r = 0.6 , n =4

120( rⁿ - 1 )/(r-1) =  120[ (0.6)⁴ - 1 ] / (0.6 -1)

= -104.448 / -0.4

= 261.12

Therefore,

Answer = 261.12