InterviewSolution
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if (1+x+1x)4=∑r1+r2+r3=44!r1!×r2!×r3!×(1)r1(x)r2(1x)r3 how many values can r1 take so that the terms in the expansion will be independent of x. ___ |
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Answer» if (1+x+1x)4=∑r1+r2+r3=44!r1!×r2!×r3!×(1)r1(x)r2(1x)r3 how many values can r1 take so that the terms in the expansion will be independent of x. |
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