Homework Help Forum: Calculus

Posted by Z32 on Thursday, November 5, 2009 at 11:27pm.

What is the antiderivative of f(x)= 2x^8 + 10x^5 - 8x^4 - 4? I got (2/9)^9 + (10/6)^6 - (8/5)^5 - 4x but it's not right.

• Calculus - Reiny, Thursday, November 5, 2009 at 11:32pm

  Your answer is correct. Check your second term, they probably reduced the 10/6 to 5/3

  
  

• Calculus - drwls, Thursday, November 5, 2009 at 11:32pm

  What happened to the x's in the first three terms? The first term should be (2/9)x^9 You made similar errors in the second and third terms by not typing in the "x" before the exponent.

  
  

• Calculus - Reiny, Thursday, November 5, 2009 at 11:36pm

  drwls is right. I didn't even notice that you dropped the x's.

  
  

• Calculus - Z32, Friday, November 6, 2009 at 4:29pm

  Oh dang. That's what I forgot. The x's. I put in the x's and the answer was correct. Thanks!

  
  

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