Verified Solution • 2025–26 Session moderate QJEEM25Mabbe6: JEE Main 2025 Mathematics - Class 11 JEEM25Mabbe6 Solution: Let . Then the value of is equal to Let f(x)=2x+2+1622x+1+2x+4+32f(x)=\frac{2^{x+2}+16}{2^{2 x+1}+2^{x+4}+32}f(x)=22x+1+2x+4+322x+2+16 . Then the value of 8(f(115)+f(215)+…+f(5915))8\left(f\left(\frac{1}{15}\right)+f\left(\frac{2}{15}\right)+\ldots+f\left(\frac{59}{15}\right)\right)8(f(151)+f(152)+…+f(1559)) is equal to Multiple Choice Options A 108 B 92 C 118 D 102 Step-by-Step Verified Solution amp;f(x)=42x+162.22x+16.2x+32amp;f(x)=2(2x+4)22x+8.2x+16amp;f(x)=22x+4amp;f(4−x)=2x2(2x+4)amp;f(x)+f(4−x)=12\begin{aligned}& f(x)=\frac{42^x+16}{2.2^{2 x}+16.2^x+32} \\& f(x)=\frac{2\left(2^x+4\right)}{2^{2 x}+8.2^x+16} \\& f(x)=\frac{2}{2^x+4} \\& f(4-x)=\frac{2^x}{2\left(2^x+4\right)} \\& f(x)+f(4-x)=\frac{1}{2}\end{aligned}amp;f(x)=2.22x+16.2x+3242x+16amp;f(x)=22x+8.2x+162(2x+4)amp;f(x)=2x+42amp;f(4−x)=2(2x+4)2xamp;f(x)+f(4−x)=21 So, f(115)+f(5915)=12\quad \mathrm{f}\left(\frac{1}{15}\right)+\mathrm{f}\left(\frac{59}{15}\right)=\frac{1}{2}f(151)+f(1559)=21 amp; Similarly =f(2915)+f(3115)=12amp;f(3015)=f(2)=222+4=28=14amp;⇒8(29×12+14)\begin{aligned}& \text { Similarly }=f\left(\frac{29}{15}\right)+f\left(\frac{31}{15}\right)=\frac{1}{2} \\& f\left(\frac{30}{15}\right)=f(2)=\frac{2}{2^2+4}=\frac{2}{8}=\frac{1}{4} \\& \Rightarrow 8\left(29 \times \frac{1}{2}+\frac{1}{4}\right)\end{aligned}amp; Similarly =f(1529)+f(1531)=21amp;f(1530)=f(2)=22+42=82=41amp;⇒8(29×21+41) Ans. 118 Related Learning Resources & Exam Preparation JEE Main PYQ Question Bank Browse year-wise authentic previous years' questions with solutions Authentic CBT Mock Tests Simulate official exam environment with live timer and percentile scoring