Si la sucesión es
(x - d), x, (x + d)
A = ((x - d)(x))/2
192 = x²/2 - xd/2
x²/2 - xd/2 - 192 = 0
x² - xd - 384 = 0
al ser un triángulo rectángulo debe cumplirse
(x - d)² + x² = (x + d)²
x² - 2xd + d² + x² = x² + 2xd + d²
x² - 4xd = 0
x² - xd - 384 = x² - 4xd
3xd = 384
d = 384/3x
d = 128/x
sustituimos
(x - 128/x)² + x² = (x + 128/x)²
x² + 16384/(x²) - 256 + x² = x² + 16384/(x²) + 256
x² = 512
x = 162
d = 128/(162) = 42
los lados miden
a = 12√2
b = 4√2
c = 20√2
y se cumple
A = (12√2)(4√2)/2 = 48
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