ตอบ:
#f '(x) = (1 / (ln ((x + 4) / (ln (x ^ 2 + 4))))) ((1) / ((x + 4))) ((^ 2 + 4) (LN (x ^ 2 + 4)) - (2x ^ 2 + 4x)) / ((x ^ 2 + 4) (LN (x ^ 2 + 4)))) #
คำอธิบาย:
#f '(x) = (1 / (ln ((x + 4) / (ln (x ^ 2 + 4))))) (1 / ((x + 4) / (ln (x ^ 2 + 4))))) (((1) (LN (x ^ 2 + 4)). - (x + 4) (1) / ((x ^ 2 + 4)) (2x)) / ((LN (x ^ 2 + 4))) ^ 2) #
#f '(x) = (1 / (ln ((x + 4) / (ln (x ^ 2 + 4)))))) (ln (x ^ 2 + 4) / ((x + 4))). ((LN (x ^ 2 + 4) - (2x ^ 2 + 4x) / ((x ^ 2 + 4))) / ((LN (x ^ 2 + 4))) ^ 2) #
#f '(x) = (1 / (ln ((x + 4) / (ln (x ^ 2 + 4)))))) (ยกเลิก (ln (x ^ 2 + 4)) / ((x + 4))) (((x ^ 2 + 4) (LN (x ^ 2 + 4)). - (2x ^ 2 + 4x)) / ((x ^ 2 + 4) (LN (x ^ 2 + 4)) ^ ยกเลิก (2))) #
#f '(x) = (1 / (ln ((x + 4) / (ln (x ^ 2 + 4))))) ((1) / ((x + 4))) ((^ 2 + 4) (LN (x ^ 2 + 4)) - (2x ^ 2 + 4x)) / ((x ^ 2 + 4) (LN (x ^ 2 + 4)))) #
