2 Answered Questions for the topic Standard Level IB

Standard Level Ib Calculus Binomial Theorem Ib

09/17/17

in the expansion of (3x+1)^n, the coefficient of the term in x^2 is 135n, where n E Z+. Find n.
I don't have any idea how to do this! i know how to do binomial theorem but not this. I live in the US and taking Ib sl 2 math as a junior.
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10/20/14

Exam-style IB SL maths question
The two pependicular sides of a right-angled triangle have lengths x+2 and 5x-3. The hypotenuse has length 4x+1. Find x. (Please show working!)
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