Recent content by nonechelon

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    How Do You Integrate 9x³/sqrt(1+x²) with a Trigonometric Substitution?

    thanks guys for all the help really appreciate it
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    How Do You Integrate 9x³/sqrt(1+x²) with a Trigonometric Substitution?

    Homework Statement integrate this 9x³/sqrt(1+x²) I know I am suppose to substitute using: x = tan x dx = sec²x but that's as far as i could go. its the 9x³ that confuses me on what i should do. thank you for your help in advance.
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    Integration by Parts: Solving 1/(u²(a+bu)²) with Substitution

    oops i mean integration by parts i don't know why i said substitution.sorry
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    Integration by Parts: Solving 1/(u²(a+bu)²) with Substitution

    Homework Statement 1/(u²(a+bu)²) a and b are constants u is the variable Homework Equations The Attempt at a Solution i know I am suppose to use substition by parts but i don't know what to use. thanks for help in advance