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Permutations and Combinations

The number of...

Question

The number of terms in the expansion of $(1 - 3 x)^{18}$ is

18

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19

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20

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17

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Solution

The correct option is B $19$
Given : $(1 - 3 x)^{18}$
Total number of terms $= 18 + 1 = 19$

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