The approximate value of f(5.001), where f(x)=x3−7x2+15.
see full answer
Your Exam Success, Personally Taken Care Of
1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.
An Intiative by Sri Chaitanya
a
-34.995
b
34.995
c
-38.458
d
38.458
answer is A.
(Unlock A.I Detailed Solution for FREE)
Best Courses for You
JEE
NEET
Foundation JEE
Foundation NEET
CBSE
Detailed Solution
Let x=5 and Δx=0.001. Then, we have f(5.001)=f(x+Δx)=(x+Δx)3−7(x+Δx)2+15 Now, Δy=f(x+Δx)−f(x)∴f(x+Δx)=f(x)+Δy Or ≈f(x)+f′(x)⋅Δx ( as dx=Δx) Or f(5.001)=(5)3−7(5)2+15+3(5)2−14(5)(0.001)=(125−175+15)+(75−70)(0.001)=−35+0.005=−34.995