# Find d/dx integral -1 to x of f(t)dt if f(x)=4-3x

• Mar 16th 2010, 07:03 PM
-DQ-
Find d/dx integral -1 to x of f(t)dt if f(x)=4-3x
Find d/dx integral -1 to x of f(t)dt if f(x)=4-3x
• Mar 16th 2010, 07:09 PM
dedust
Quote:

Originally Posted by -DQ-
Find d/dx integral -1 to x of f(t)dt if f(x)=4-3x

use the first fundamental theorem of calculus
• Mar 16th 2010, 07:15 PM
-DQ-
i tried, and failed

isnt x to any constant equal to dy/dx

is d/dx the same as dy/dx making it 4-3x
• Mar 16th 2010, 07:25 PM
dedust
Quote:

Originally Posted by -DQ-
i tried, and failed

• Mar 17th 2010, 02:06 AM
-DQ-
• Mar 17th 2010, 02:11 AM
HallsofIvy
Where? The only thing I see is
Quote:

isnt x to any constant equal to dy/dx

is d/dx the same as dy/dx making it 4-3x
Two questions, no work.

The first suggestion was that you use the "fundamental theorem of calculus". You said "I tried and failed". HOW did you try? What answer would the fundamental theorem give you?
• Mar 17th 2010, 02:14 AM
-DQ-
woudn't it just be (4-3x)(1) yielding 4-3x since it's going from a constant to x.

that is my work..