Math Question and Answers


Question and Answers Forum

All Questions Topic List
Algebra Questions
Previous in All Question Next in All Question
Previous in Algebra Next in Algebra
Question Number 183843 by Michaelfaraday last updated on 30/Dec/22

	Answered by mr W last updated on 31/Dec/22

	$(\underset{a = 0}{\sum^{4}} C_{a}^{4} x^{2 a}) (\underset{b = 0}{\sum^{7}} C_{b}^{7} x^{3 b}) (\underset{c = 0}{\sum^{12}} C_{c}^{12} x^{4 c})$ $2 a + 3 b + 4 c = 11$ $\Rightarrow a = 0, b = 1, c = 2$ $\Rightarrow a = 1, b = 3, c = 0$ $\Rightarrow a = 2, b = 1, c = 1$ $\Rightarrow a = 4, b = 1, c = 0$ $C_{0}^{4} C_{1}^{7} C_{2}^{12} + C_{1}^{4} C_{3}^{7} C_{0}^{12} + C_{2}^{4} C_{1}^{7} C_{1}^{12} + C_{4}^{4} C_{1}^{7} C_{0}^{12}$ $= 1113 ✓$
	Commented by manxsol last updated on 31/Dec/22

	$t o d a y l e a r n, t h a n k s S i r W$
	Commented by Michaelfaraday last updated on 31/Dec/22

	$t h a n k s$
Terms of Service
Privacy Policy
Contact: info@tinkutara.com

Question and Answers Forum