Question
If number of terms in the expansion of (x−2y+3z)n are 45, then n =
Answer: Option B
:
B
(n+1)(n+2)2 = 45 or n2 + 3n - 88 = 0 ⇒n = 8 .
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:
B
(n+1)(n+2)2 = 45 or n2 + 3n - 88 = 0 ⇒n = 8 .
Was this answer helpful ?
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