CÂU20,5(3ĐIỂM)(3ĐIỂM)

1/ - DE THI DAP AN THI 10 MOI BAC NINH
Lớp 10 Toán DE THI DAP AN THI 10 MOI BAC NINH
1/P =

(

√

x −

2

1

−

1

√

x

)

.

(

1−

√

x

1

+1

)

=

(

2

(

√√

x −

x −

1)

√

x

.

√

+1

x

)

.

(

√

x

√

+

x

1

+1

−1

)

=

(

(

√

x −

√

x

1)

+1

.

√

x

)

.

(

√√

x

+1

x

)

0,25 =

1

√

x −

1

0,5

1

2