Comprehension

Directions: Read the following information and answer the two items that follow:

Let f(x) = x2, g(x) = tan x and h(x) = In x.

For , what is the value of [ho(gof)](x)?

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NDA (Held On: 17 Nov 2019) Maths Previous Year paper
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Answer (Detailed Solution Below)

Option 1 : 0
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NDA 01/2025: English Subject Test
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Detailed Solution

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Concept:

If f :A → B and g : C → D. Then (fog) (x) will exist if and only if co-domain of g = domain of f i.e D = A and (gof) (x) will exist if and only if co-domain of f = domain of g i.e B = C.

Calculation:

Given: f(x) = x2, g(x) = tan x and h(x) = In x

⇒ [ho(gof)](x) = [h(g(x2))] = h(tan (x2)) = ln (tan (x2))

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