C 1- C 0-2 C 2- C 1-15 C 15- C 14-A- 100B- 120C- -120D- None of these

The correct option is B 120C_1/C_0+2C_2/C_1+3C_3/C_2+_⋯ +n.C_n/C_n 1=n(n+1)/2 Putting n = 15, then 15 ×(15+1)/2=120 ...

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Unit Vectors

C 1/ C 0+2 C ...

Question

$\frac{C_{1}}{C_{0}} + 2 \frac{C_{2}}{C_{1}} + \dots + 15 \frac{C_{15}}{C_{14}} =$

100

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120

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-120

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None of these

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\frac{C_{1}}{C_{0}} + 2 \frac{C_{2}}{C_{1}} + 3 \frac{C_{3}}{C_{2}} + . . . . + 15 \frac{C_{15}}{C_{14}}

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\frac{C_{1}}{C_{0}} + 2 \frac{C_{2}}{C_{1}} + 3 \frac{C_{3}}{C_{2}} + \dots + 15 \frac{C_{15}}{C_{14}}

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\frac{C_{1}}{C_{0}} + \frac{2 C_{2}}{C_{1}} + \frac{3 C_{3}}{C_{2}} + . . . . + \frac{n C_{n}}{C_{n - 1}} =

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