Answer:
Step-by-step explanation:
The given expression describes the GP with
<u>The first term:</u>
- t = 80(1.23²⁻²) = 80(1.23⁰) = 80
<u>The common ratio: </u>
It is required to find the sum of the terms from 2 (the bottom number of sigma) through 29 (the top number of sigma)
The number of terms is
The sum of the first 28 terms is
- Sₙ = t(rⁿ - 1)/(r - 1)
- S₂₈ = 80(1.23²⁸ - 1)/(1.23 - 1) = 114125.75573 ≈ 114126 (rounded)
The answer is no solution
=10(4+13x-5)
=10(-1+13x)
=-10(13x)
=-130x
Answer:
x² + y² = 9
Step-by-step explanation:
The equation of a circle centred at the origin is
x² + y² = r² ← r is the radius
Here r = 3, hence
x² + y² = 3² ⇒ x² + y² = 9
