Register to reply 
Definite Integral [help] 
Share this thread: 
#1
Jan2308, 02:56 AM

P: 15

hello, can anyone help me how to complete the following definite integral? Thanks!!
∫ (x^2)*sqrt(7 x + 9) dx (From 0 to 1) 


#2
Jan2308, 03:23 AM

P: 365

Try the substitution
[tex]\sqrt{7x+9}=y[/tex] 


#3
Jan2308, 11:19 AM

P: 15

sorry, I still can't figure out it, can you give me some more detail? thanks a lot .



#4
Jan2308, 11:23 AM

Math
Emeritus
Sci Advisor
Thanks
PF Gold
P: 39,339

Definite Integral [help]
If [itex]y= \sqrt{7x+ 9}[/itex], what is dx (in terms of dy and y)? What is x in terms of y? (So you can substitute for that x^{2}.)



#5
Jan2308, 11:59 AM

P: 15

I got it, thanks for help!! ^^



Register to reply 
Related Discussions  
Definite Integral  Calculus & Beyond Homework  1  
Please HeLp with definite integral  Introductory Physics Homework  4  
Definite integral  Calculus & Beyond Homework  4  
Definite Integral  Calculus  1  
Definite Integral  Calculus  3 