Use the Binomial Theorem to write the first three terms of the binomial.
$(a + b)^{20}$

Answer

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Answer

So, the first three terms of the binomial $(a + b)^{20}$ are $a^{20} + 20 a^{19} b + 190 a^{18} b^{2}$ .

Steps

Step 1 ：Using the Binomial Theorem, we can write the first three terms of the binomial $(a + b)^{20}$ as follows:

Step 2 ：The first term is $(\binom{20}{0}) a^{20} b^{0} = a^{20}$ .

Step 3 ：The second term is $(\binom{20}{1}) a^{19} b^{1} = 20 a^{19} b$ .

Step 4 ：The third term is $(\binom{20}{2}) a^{18} b^{2} = 190 a^{18} b^{2}$ .

Step 5 ：So, the first three terms of the binomial $(a + b)^{20}$ are $a^{20} + 20 a^{19} b + 190 a^{18} b^{2}$ .