Answer:
1/4 is correct answer
Step-by-step explanation:
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a^5x^5, 10a^5x^4, 40a^5x^3
Use pascal's triangle for the first one
(2+x)^5 * a^5
= x^5a^5 + 5*2^1*x^4*a^5 + 10*2^2*x^3*a^5 ...
= a^5x^5 + 10a^5x^4+ 40a^5x^3 ...
