LOGEST(known_y's[,known_x's,const,stat])
LOGEST y = b * m{1}^x{1} * m{2}^x{2}... .
@known_x' , {1, 2, 3, ...}. LOGEST { m{n},m{n-1}, ...,m{1},b }.
@known_y @known_x , LOGEST #NUM!.
@const (FALSE), (0,1), b = 1. (TRUE).
@stat TRUE, . , . m1, (m2, ...), b. y. F . .
@stat (FALSE).
LOGEST, GROWTH, TREND.