1/sqrt(10) or, since sqrt(1) = 1, also sqrt(1/10)
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1.1111
1/10 is the multiplicative inverse of 10
The inverse of 0.3 is 10/3, or 3.3
The multiplicative inverse of a complex number is found by taking the complex conjugate of the number and dividing by the square of its magnitude. For the complex number 3-i, the complex conjugate is 3+i. The magnitude of 3-i is sqrt(3^2 + (-1)^2) = sqrt(9 + 1) = sqrt(10). Therefore, the multiplicative inverse of 3-i is (3+i) / 10.
the multiplicative inverse for 5 is 1/5 because you would have to flip the number