Let K be the sum of the coefficients of the odd powers of x in the expansion of (1+x)99. Let a be the middle term in the expansion of (2+21)200. If aC99200K=n2lm, where m and n are odd numbers, then the ordered pair (l,n) is equal to:
Held on 29 Jan 2023 · Verified 6 Jul 2026.
(50,51)
(51,99)
(50,101)
(51,101)
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If the roots of x² - 5x + k = 0 are in the ratio 2:3, then k equals:
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