Answer:
I’m ok
Step-by-step explanation:
good evening ,
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Answer:
x=3 or x= -3
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Step-by-step explanation:
x²=9 ⇔ x²-9=0 ⇔ (x-3)(x+3)=0 ⇔ x-3=0 or x+3=0 ⇔ x=3 or x= -3.
:)
Answer:
(3,4)
Step-by-step explanation:
f(x) = x + 1/x
f(1 + 3i), lets just sub x by 1 + 3i
f(1 + 3i) = 1 + 3i + 1/(1 + 3i)
Doing the sum (1 + 3i) + 1/(1 + 3i) we get ((1 + 3i)² + 1)/(1 + 3i)
So:
f(1 + 3i) = (1 + 2.1.3i + 9i² + 1)/(1 + 3i)
f(1 + 3i) = (6i - 7)/(1 + 3i)
f(1 + 3i) = 11/10 + 27i/10
