Use your formula from question 2c to find the values of t7 and t20. (r=7; 2,14,98,686) (Geometric Sequence)

Correct  t₇ -  a₇ = 2 · 7⁶,  t₂₀ - a₂₀ = 2 · 7¹⁹

Step-by-step explanation:

Given:

Geometric sequence  2, 14, 98, 686,

First term is a₁ = 2

Second term a₂ = 14

Third term a₃ = 98

The quotient ( ratio) is obtained as follows:

r = 14 / 2 = 98 / 14 = 7

r = 7

n-th term is obtained as follows:

aₙ = a₁ · rⁿ⁻¹

according to this:

a₇ = 2 · 7⁶ = 2 · 117,649 = 235,298

a₂₀ = 2 · 7¹⁹ = 2 · 11,398,895,185,373,143 = 22,797,790,370,746,286

God is with you!!!

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.

if you was gonna solve for a, a is a   < -12