A) 9
B) 0
C) 5
D) 10
Correct Answer: C
Solution :
Given expression \[=2\,[1+{{\,}^{9}}{{C}_{2}}{{(3\sqrt{2}x)}^{2}}+{{\,}^{9}}{{C}_{4}}{{(3\sqrt{2}x)}^{4}}\]\[+{{\,}^{9}}{{C}_{6}}{{(3\sqrt{2}x)}^{6}}+{{\,}^{9}}{{C}_{8}}{{(3\sqrt{2}x)}^{8}}]\] \ The number of non-zero terms is 5.
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