Thank you for verifying my answer, i was doubting everything i did and i wasnt sure i had done it correctly. But I found my mistake with the chain/product method, though it actually took me way longer to use the chain/product rules. I applied the chain rule and got the first derivative as...
Thanks for the suggestions! I expanded the original equation and recalculated the second derivative and got: y''=120x4+1200x3+3600x2+3000x
But romsofia suggested that my original x4 term's coefficient was wrong, but even after i went back and recalculated carefully, i ended up with 120x4 again...
Well i thought about doing that but i was unsure whether or not my professor wanted us to use the chain rule. But if he did wanted us to use the chain rule, would it even be feasible to use it on the second derivative?
Is the answer i got correct though at least?
So i have an equation problem that i need to find the 2nd derivative of, but my understanding of the chain rule is not the best. I tried working it out but i don't know if i did it correctly.
i was given the equation y=4(x2+5x)3
So to take the first derivative, i started off by using the chain...