3 years ago

HELP PLEASEEEE I don’t get it

Mathematics

2 answers:

jek_recluse [69]3 years ago

7 0

10 is answer choice B

11 is answer choice A

vredina [299]3 years ago

6 0

The answer is A!!

Hope this helps!!

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What is the coefficient of the third term in the binomial expansion of (a + b)6? 1 15 20 90

Sholpan [36]

Answer: 15

Step-by-step explanation:

(r+1)th term of $(a+b)^n$ is given by:-

$T_{r+1}=\ ^nC_r(a)^{n-r}b^r$

For $(a+b)^6$ , n= 6

$T_3=T_{2+1}=\ ^6C_2(a)^{6-2}(b)^2\\\\$

$=\ \dfrac{6!}{4!2!}a^4b^2\ \ \ [^nC_r=\dfrac{n!}{r!(n-r)!}]\\\\=\dfrac{6\times5\times4!}{4!\times2}a^4b^2\\\\=3\times5a^4b^2\\\\ =15a^4b^2$

Hence, the coefficient of the third term in the binomial expansion of $(a+b)^6$ is 15.

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3 years ago

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Simora [160]

Answer:

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Step-by-step explanation:

-6+8=2

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Express in scientific information notation 417.8

bogdanovich [222]

Answer:

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Step-by-step explanation:

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GarryVolchara [31]

$\frac{3}{7}$ is more than $\frac{5}{14}$ , because:
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So, the correct sign for this is >.
Have a great day! ♪

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In the following image, AB is parallel to DC, and BC is a transversal intersecting both parallel lines.

professor190 [17]

Yea sir thanks buddy thanks again

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