In the expansion of (cosθx+xsinθ1)16, if l1 is the least value of the term independent of x when 8π≤θ≤4π and l2 is the least value of the term independent of x when 16π≤θ≤8π, then the ratio l2:l1 is equal to:
Held on 9 Jan 2020 · Verified 6 Jul 2026.
1:8
16:1
8:1
1:16
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