If $ f(x) = 2x^2 - 3x + 5 $, find $ f(3) $.

Question

If $ y = \operatorname{sgn}(\sin x) + \operatorname{sgn}(\cos x) + \operatorname{sgn}(\tan x) + \operatorname{sgn}(\cot x) $, where $\operatorname{sgn}(p)$ denotes the signum function of $p$, then the sum of elements in the range of $y$ is:

Answer 1

Step 1: Substitute the value $ x = 3 $ into the function
The provided function is $ f(x) = 2x^2 - 3x + 5 $. The objective is to compute $ f(3) $.
Replace $ x $ with $ 3 $ in the function: \[ f(3) = 2(3)^2 - 3(3) + 5 \]
Step 2: Evaluate the expression
\[ f(3) = 2(9) - 9 + 5 = 18 - 9 + 5 = 18 \]
Result:
Consequently, $ f(3) = 18 $. The correct option is (2).

If $ f(x) = 2x^2 - 3x + 5 $, find $ f(3) $.

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The Correct Option is B

Solution and Explanation

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