help in 4 part plzzzzz.
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Answer:
3
Step-by-step explanation:
Let a=√26-√17
b=√26+√17
so a*b=(√26-√17)(√26+√17)
=(√26)²-(√17)² [ because (a-b)(a+b)=a²-b²]
=26-17
a*b=9
We know that mean proportion of a and b
=√a*b
=√9
=3
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