pottersheep
Derive y= (3x-9)^9(x+2)^6
I get y1= 162(3x-9)^8(x+2)^5?
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pottersheep
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The answer is 45x(3x-9)^8(x+2)^5...I don't get it!
zenai
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you must use the product rule combined with using the chain rule when you find each derivative.
pottersheep
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Yep that's what I did! Should I show you my steps?
zenai
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yes please, let me take a look
pottersheep
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y = (3x-9)^9(x+2)^6
y1 = 9(3)(3x-8)^8 (6)(1)(x+2)^5
y1 = 162 (3x-9)^8(x+2)^5
pottersheep
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Thank you
pottersheep
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Have I gone wrong somewhere?
zenai
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yes you forgot to put an addition sign. the product formula is a*d/dx(b) + d/dx(a) * b
pottersheep
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OHHHHHHH
zenai
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when you take the d/dx of the a and the b terms, that's when you execute the sign rule. this is an annoying question lol it will take some time to compute it all
pottersheep
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Thank you!!!!!
zenai
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no problem!