Let $f(x)=3x^4-7x^3+2x^2-bx+1$. For what value of $b$ is $f(1)=1$?
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Let $f(x)=3x^4-7x^3+2x^2-bx+1$. For what value of $b$ is $f(1)=1$?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
-2
Let $f(x)=3x^4-7x^3+2x^2-bx+1$. For what value of $b$ is $f(1)=1$?
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