Architecture
°ÇÃà Architecture


x Ãà°ú ¼­·Î ´Ù¸¥ µÎ Á¡(two points on x axis)¿¡¼­ ¸¸³ª´Â ÀÌÂ÷ÇÔ¼ö(quadratic function)ÀÇ ÃÖ´ë, ÃÖ¼Ò °ª

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Type1 Type2
µÎ Á¡ (x1, 0), (x2, 0) À» Áö³ª´Â ÀÌÂ÷ÇÔ¼öÀÇ ÃÖ´ë ¶Ç´Â ÃÖ¼Ò°ªÀ» ±¸ÇÑ´Ù.

y = a(x-x1)(x-x2)
  = ax^2 - a(x1+x2)x + ax1x2

ÃÖ´ë, ÃÖ¼Ò°ªÀ» °®´Â x °ª xp ´Â,

xp = a(x1+x2)/(2a) = (x1+x2)/2

°¡ µÇ°í, yp (= ymax or ymin) °ªÀº,

yp = (a/4)(x1+x2)^2 - (a/2)(x1+x2)^2 + ax1x2
    = a(x1x2 - (1/4)(x1+x2)^2)

0 < a À̸é ÃÖ¼Ò°ª (yp = ymin) À», a < 0 À̸é ÃÖ´ë°ª (yp = ymax) À» °®´Â´Ù.
¡à input data






0 < a ¡æ yp = ymin
a < 0 ¡æ yp = ymax
¡Ø ÀÌ »çÀÌÆ®´Â ±¤°í¼öÀÍÀ¸·Î ¿î¿µµË´Ï´Ù.

¡Ø »¡°£»ö ¹ØÁٺκп¡ ÀڷḦ ÀÔ·ÂÇϼ¼¿ä.
¡Ø Input data on
red underlines.

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