I just need my answers checked.
1) Find the derivative.
f(x)=3x^5/4 - 8/9x^9/8 + x^2 - 9x + 1
Answer: f’(x)= 15/4x^1/4 - x ^1/8 + 2x -9
2) Let f(x)= 7x^3 - 9x. Find f’(5)
Answer: f’(x)=21x^2-9
f’(5)=516
3) Find the given limit by evaluating the derivative.
lim h⇒0 5(7+h)^2 - (7+h)-238
Answer: 69
4) Find the slope and an equation of the tangent line to the graph of the function f at the specified point.
f(x)=-1/3x^2+5x+5: (-1, -1/3)
Answer: f’(x)=-2/3x + 5
y=-2/3x -1
4 answers
correct.
for #4 I get a slope of 17/3 not -2/3
(-2/3)(-1) + 5 = 17/3
(-2/3)(-1) + 5 = 17/3
Thanks. I will check my answer.
coreectttttttttttttttt dear
1 answer