Question

5.The mean proportion of ( √27- √ 18) , (√27 +√18) is​

Answer 1

Answer:

If a:b = b:c

Then b is the mean proportion.

b² = ac

= (√27 - √18)(√27 + √18)

= 27 - 18 = 9

b = √9 = ±3

:-)