Question
Mathematics Question on Functions
If f(x)=22x+222x,x∈R, then f(20231)+f(20232)+…+f(20232022) is equal to
A
1011
B
2010
C
1010
D
2011
Answer
1011
Explanation
Solution
The correct answer is (A) : 1011
f(x)=4x+24x
f(x)+f(1−x)=4x+24x+41−x+241−x
=4x+24x+4+2(4x)4
=4x+24x+2+4x2
=1
⇒f(x)+f(1−x)=1
Now f(20231)+f(20232)+f(20233)+……+
………+f(1−20233)+f(1−20232)+f(1−20231)
Now sum of terms equidistant from beginning and end is 1
Sum =1+1+1+……….+1(1011 times )
=1011