hi,

i've a mathe exercise with the taylor series that i did on paper. i use maple to solve my tasks but now i have a situation where i am sure that i am not wrong but maple tells me something other

my function

f(x) = sqrt(x-1)

x_o = 5

i derivated the function tree times

f'(x) = (1/2)(x-1)^(-1/2)

f''(x) = -(1/4)(x-1)^(-3/2)

f'''(x) = (3/8)(x-1)^(-5/2)

for my x_o
f(5) = 2

f'(5) = 0.25

f''(5)=-0.03125

f'''(5) = 0.011171875

hi, i've the following task to solve with maple. 2 vectors: r:= Vector([-2,-3,2]) and s:= Vector([4,3,-3]) i've to find the vector t that is orthogonal to r and s. the length of the vector t have to be 7. (i am not allowed to use the commands CrossProduct() and VectorAngle()) i solved this task already on paper but i don't know how to key in the commands in maple to calculate it in maple. this is my try : Mat_r_s:=

hello, i have some problems with maple. i need to know an inflexionpoint of the following function: f:= x->((x^3-x+1+(6/30))/(x^2-1)); i derivate till f'''(x) with the following commands dv1: D(f)(x); dv2: (D@@2)(f)(x); dv3: (D@@3)(f)(x); and here starts my problems. maple seems to do nothing. for dervation f'(x) and f''(x) it shows me nothing for derivation f'''(x) just a 0. i suppose the mistake is in front of the computer :O. so what is wrong? here my exact commands: restart; f:= x->((x^3-x+1+(6/30))/(x^2-1)); df1:= D(f)(x): df2:= (D@@2)(f)(x): df3:= (D@@3)(f)(x):