If f (x) = { (3,5), (2,4), (1,7) } and g (x) = square root (x-3) what do i do to determine (f+g) (1) ... ?

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Mathematics

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11 October, 14:20

If f (x) = { (3,5), (2,4), (1,7) } and g (x) = square root (x-3) what do i do to determine (f+g) (1) ... ?

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Answers (1)

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Murphy · Answer 1

(f + g) (1) = f (1) + g (1)

f (1) = 7

g (1) = √ (1 - 3) = √ ( - 2) = √ 2 · √ (-1) = i √ 2 (we know that √ ( - 1) = i, or irrational number)

Answer:

(f + g) (1) = 7 + i √ 2