Cthawkins23 Cthawkins23

18-04-2022
Mathematics

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What is the value of the 13th coefficient in the expansion of {(a + b)}^{15} ?
3,003
105
455
1,365

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ferrybukantoro ferrybukantoro

18-04-2022

Step-by-step explanation:

the value of the 13th coefficient in the expansion of {(a + b)}^{15} :

(13-1)C15 = 12C15 = 15! / 3!. 12!

= 15×14×13×12! / 3×2×12!

= 2730/6

= 455

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