Question

Please answer this question along with the explanation of how to rationalise the denominator in this question.​

Answer 1

Answer:

4 is the right answer

Step-by-step explanation:

hope its help full

Answer 2

Answer:

y = summation(n=1 to 8) (1/(√n+√n+1))

y = (n=1 to 8) ((√n-√n+1)/(n-n-1))

y = (n=1 to 8) (√n -√(n+1))

y = 1 - √2 +√2-√3 +√3-√4+....-√8+√9

y = 1+√9

y= 1+3

y=4