Q.

Let f:RR be a function defined f(x)=2e2xe2x+e. Then f1100+f2100+f3100+........+f99100 is equal to ________

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answer is 99.

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Detailed Solution

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f(x)+f(1-x)=2e2xe2x+e+2e2-2xe2-ex+e=e2xe2x+e+e2e2+e2x+1 =2e2x-1e2x-1+1+11+e2x-1=2   f1100+f2100+f3100+.....+f99100 =f1100+f99100+f2100+f98100+.....+f49100+f51100+f12 =(2+2+2+----49times)+2ee+e =98+1=99

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