1) (a) What is the coefficient of x 3 y 4 in( 3x 4y) 7 (b) What is the coefficient of x 2 y 7 in(5x y) 9 (c) What is the coefficient of x 5 y 3 in(3x 4y) 8 (d) What is the coefficient of x 6 y 1 in( 2x 5y) 7 2) Use the binomial theorem to nd a oloeed forrn expression equivalent to the following some (a) Z (1 ) 3'14) k W k

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1) (a) What is the coefficient of x 3 y 4 in(-3x + 4y) 7 ? (b) What is the coefficient of x 2 y

1) (a) What is the coefficient of x³y⁴in(-3x + 4y)⁷?

(b) What is the coefficient of x²y⁷in(5x - y)⁹?

(d) What is the coefficient of x⁶y¹in(-2x - 5y)⁷?

2) Use the binomial theorem to nd a oloeed forrn expression equivalent to the following some: (a) Z (1;) 3'14)\" k= W k=

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