Question

Is the sollution incorrect

Answer 1

it should be nC3 and nC4 right ?

Answer 2

you're right!
the solution has incorrect start

Answer 3

yeah too many mistakes are there in the textbook lol

Answer 4

binomial expansions always starts at index 0

Answer 5

yeah

Answer 6

so fourth term coefficent would be \(\binom{n}{3}\)

and fifth term coefficent would be \(\binom{n}{4}\)

Answer 7

the solution has a mistake in the start but the method looks correct

Answer 8

i got the answer , it is easy , but not there in options , the options are also incorrect

Answer 9

yeah method is correct

Answer 10

yeah most likely a careless mistake from author

Answer 11

report it , to fix it next year

Answer 12

yeah