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(i) Find the value of r, if the coefficients of (2r + 2)th and (r-2)th terms in the expansion of (1+x)^{18} are equal. (ii) Find the coefficient of x−17 in the expansion of (x4−1x3)15 (iii) Find the term independent of x in the expansion of (2x−1x)10 |
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Answer» (i) Find the value of r, if the coefficients of (2r + 2)th and (r-2)th terms in the expansion of (1+x)^{18} are equal. (ii) Find the coefficient of x−17 in the expansion of (x4−1x3)15 (iii) Find the term independent of x in the expansion of (2x−1x)10 |
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