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erma4kov [3.2K]
3 years ago
15

5. Which statement is NOT true?

Mathematics
1 answer:
liubo4ka [24]3 years ago
6 0

Answer:

x^{2} =1, then\ x=1 is NOT true.

Step-by-step explanation:

1.

If\ x=1, then\ x^{2} =1 ......True

( 1 )² = 1

2.

If x^{2} =1, then\ x=1 ........ NOT True

∴ x =± 1     .........this is correct

3.

If\ x=-1, then\ x^{2} =1 ......True

( -1 )² = 1

4.

x2 = 1 if and only if x = 1 or x = -1. .........True

( 1 )²  = 1

( -1 )² = 1

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