exam Maths Puzzle Numerical Ability

What is the coeffictient of the x^5 part of the expansion of (a+bx+cx^2)^8?

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exam Other Question

What is f(x) if f(x) is a function of q(x) with q(x) � x + 4?
@ Since we do not know the specific relationship between f(x) and q(x), this cannot be determined.
a. f(x) = q(x) + How many three-digit numbers are palindromes?