AP EAMCET · Maths · Functions
The range of the real valued function is
- A
- B
- C
- D
Answer & Solution
Correct Answer
(D)
Step-by-step Solution
Detailed explanation
Given fx=x2+2x+8x2+2x+4 =1+4x2+2x+4=1+4x+12+3 We know, 3≤x+12+3<∞ ⇒0<4x+12+3≤43⇒1<1+4x+12+3≤73 ⇒1<1+4x+12+3≤73 Hence, range of fx will be (1,73]
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