Question 131
If $$(1 + x)^{10} = a_0 + a_1x + a_2x2 + ...... + a_{10}x^{10}$$ then $$3(a_0 + a_2 + a_4 + .... + a_{10}) - 2(a_1 + a_3 + a_5 + ...... + a_9) =$$
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