If the multinomial (a + b + c + d + e + f + g)15 is expanded and like terms collected

Monday, 22 April 2019

7:53 PM

a) 
How many terms will there be altogether? 
comb (15+7-1, 7-1)

 

Use the unordered repetition formula?!?!?

 

 

b) 
What will be the coefficient of a3b2c2d2e2 f 2 g2?

Divide by the coefficient terms

 

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