Чётность/нечетность: f (x) = 6tg4x-3x^7 f (x) = (9x-10) / / (5x+2) - (9x+10) / / (5x-2)

F (x) = 6 tg 4 х - 3 х⁷

f (-x) = - 6 tg 4 х + 3x7 = - (6 tg 4x - 3 х7),

f (x) = - f (-х) нечетная.

f (x) = (9 х - 10) / (5 х + 2) - (9 х + 10) / (5 х - 2),

f (-x) = (-9x - 10) / (-5 х + 2) - (-9 х + 10) / (-5 х - 2),

f (-x) = [ - (9x + 10) ] / [ - (5x - 2) ] - [ - (9x - 10) ] / [ - (5 х + 2) ],

f (-x) = (9 х + 10) / (5 х - 2) - (9 х - 10) / (5x + 2),

f (-x) = - [ (9x - 10) / (5x + 2) - (9x + 10) / (5x - 2) ],

f (x) = - f ( - х) нечетная.