Math, asked by kpratyush89, 10 months ago

Please solve the question........​

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Answered by Anonymous
1

\huge\boxed{Answer}

{3y + (-1)}^7

=> (3y)⁷ + 7c1(3y)⁶ (-1) + 7c2(3y)⁵ (-1)²

+ 7c3(3y)⁴(-1)³ + 7c4 (3y)³ (-1)⁴ + 7c5

(3y)²(-1)⁵ + 7c6 (3y)¹ (-1)⁶ + (-1)⁷

= 2187y⁷ + 7(729y⁶)(-1) + 21(243y⁵)(1)

+ 35(81y⁴)(-1) + 35(27y³) (1) + 21(9y²)+

(-1) + 7(3y) + (-1)

= 2187y⁷ - 5103y⁶ + 5103y⁵ - 2835y⁴

+ 945y³ - 189y² + 21y - 1

From comparing the giving eq.-

a0y⁷ + a1y⁶ + a2y⁵ + a3y⁴ + a4y³ +

+ a5y² + a6y + a7

a0 = 2187 , a1 = -5103 , a2 = 5103

a3 = -2835 , a4 = 945 , a5 = -189

a6 = 21 , a7 = -1

Now ,

(a0 + a1 + a2 + a3 + a4 + a5 + a6 +

a7) / 2⁵

(2187 - 2835 + 945 - 189 + 20) / 2⁵

= (2207 + 945 - 3024) / 2⁵

= (3152 - 3024) / 2⁵

= 128 / 32

= 4

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