Question

Pls Answer Quickly! Pls show work so that I can understand

Answer 1

• 2084, 1.1111

Explanation:

Q1

Given GP

• 4, -20, 100,...

Common ratio is:

• r = -20/4 = 100/-20 = -5

Sum of 5 terms:

• S₅ = 4( (-5)⁵ - 1)/(-5 - 1) = 2084

Q2

Given GP

• 1, 1/10, 1/100, ...

Common ratio is:

• r = 1/10 : 1 = 1/100 : 1/10 = 1/10

Sum of 5 terms:

• S₅ = 1*((1/10)⁵ - 1)/((1/10 - 1) = 1.1111