Answers

2015-05-05T14:28:00+05:30
2^x+2^(x+1)+2^(x+2)+2^(x+3)=15√32
2^x(1+2+2^2+2^3)=15√32
2^x(1+2+4+8)=15√32
2^x(15)=15√32
2^x=√32
taking log on both side
log2^x=log√32
x log 2=1/2 log 32    use logm^n=nlogm
xlog 2=1/2 log 2^5
xlog2=5/2log2
x=5/2
1 5 1
thankyou Ration ji
Rational ji
thank u very much