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The number of real roots of (x + 3)^4 + (x + 5)^4 = 16 is ….. (a) 4 (b) 2 (c) 3 (d) 0

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The number of real roots of (x + 3)4 + (x + 5)4 = 16 is …..

(a) 4 

(b) 2 

(c) 3 

(d) 0

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Best answer

(a) 4

The equation is (x + 3)4 + (x + 5)4 = 16 

(x + 3)4 + (x + 5)4 = 24 

This is biquadratic equation. It has 4 roots.

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