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A geometric series represents the partial sums of a geometric sequence. The nth term in a geometric series with first term a and common ratio r is:T(n) = a(1 - r^n)/(1 - r)
A geometric sequence is : a•r^n which is ascending if a is greater than 0 and r is greater than 1.
b = base. h = height.Depends what shape. A rectangle or square is length x width. A trapezoid is h/2(b1 +b2). A triangle is 1/2bh. A circle is pi x r^2.
The sum of the series a + ar + ar2 + ... is a/(1 - r) for |r| < 1
The formula to find the sum of a geometric sequence is adding a + ar + ar2 + ar3 + ar4. The sum, to n terms, is given byS(n) = a*(1 - r^n)/(1 - r) or, equivalently, a*(r^n - 1)/(r - 1)