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(y + k)^5 का विस्तार करो।

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(y + k)5 का विस्तार करो।

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(y+k)5 = 5C0 (y)5 + 5C1 (y)4 (k)1 + 5C2 (y)3 (k)2 + 5C3 (y)2 (k)3 + 5C4 (y)1(k)4 + 5C5 (k)5

= 1 × y5 + 5y4k1 + 10y3k2 + 10y2k2 + 5y1k4 + 1 × k5

= y5 + 5y4k + 10y3k2 + 10y2k3 + 5yk4 + k5

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