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Grade: 11

                        

(x 2 +1+1/x 2 ) n Total number of terms ? any formula for this ? i saw 2n+1 but how? any reasons please expain it

3 years ago

Answers : (2)

Arun
24737 Points
							
lowest power would be = x –n
highest power would be = xn
since it has continuous power of x (– 1, 0, 1)
expansion will have all the powers from ranging –n to n.
hence there will be (2n+1) terms
3 years ago
MANOJ MISHRA
9 Points
							
Put n=1 
Noy there are 3 terms
Check the option by putting n=1 if any option give anser 3 the option is correct
one year ago
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