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Drawing in the math textbook of senior one.
( 1)δ= 4-4a & gt; 0a & lt; By combining 1 with a≠0, we can know a∈(-∞, 0)∩(0, 1).

(2) There are two different solutions, namely A.

f(x)=0 (x- 1/a)? = 1/a? -1x = 1/a root number (1/a? - 1)

So there is 0.

Solution 0

Solution 1/a- radical sign (1/a? - 1)& lt; 1 root sign (1/a? -1)> 1/a- 1 note1/a-1>; 0 so 1/a? - 1 & gt; 1/a? -2/a+ 1 2/a & gt; Because of a man

Solution 1 < 1/a+ radical sign (1/a? -1) has a root sign (1/a? -1) > 0>1-1/a has been satisfied.

Solve the root sign of 1/a+ (1/a? - 1)& lt; 2 has a root sign (1/a? - 1)& lt; 2- 1/ A Zhi 0 and1/a? - 1 & lt; (2- 1/a)? =4-4/a+ 1/a?

Get a> 1/2 and a >;; 4/5 So there is a & gt4/5.

Comprehensive 4/5