What is the sum of the geometric series 3∑i=1(8(1/4)^i-1)? a.) 21 b.) 21/2 c.) 10 d.) 21/8

Step-by-step explanation:

Geometric series is a sequence of form , such that is constant .

To find : sum of the geometric series  

Solution:

For i = 1:

Put i = 1 in the term

( here, formula used: )

For i = 2:

Put i= 2 in the term

For i = 3:

Put i = 3 in the term

Therefore,

So, option 2. is correct

123

step-by-step explanation:

agngel

answer:   x = 3 + √11     and     x = 3 - √11

step-by-step explanation:

x² - 6x + 9 = 11

(x - 3)² = 11

x - 3 = ±√11

    x = 3 ± √11

x = 3 + √11     and     x = 3 - √11