What is the 5th term in the binomial expansion
(a+b)^7

5th term is 35a^4b^3

Step-by-step explanation:

We need to find the 5th term in binomial expansion (a+b)^7

The binomial theorem is:

We are given

x=a,

y =b

n=7

and k= 4 since we have to find 5th term but k starts from zero

putting the values

So, 5th term is 35a^4b^3

d. bc = 12 and ef = 16

step-by-step explanation:

we are given that δabc : δdef such that .

also, it is given that

so, from the options, we need that .

a.

b.

c.  

d.

as, we can see that only option d gives the same ratio as i.e. .

hence, the possible lengths are bc = 12 and ef = 16.

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i hope this answer !

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