5^34+6^53-12^0
5^34=..........................5
5^1=5
5^2=.25
5^3=..25
5^4=..25
5^5=....25
6^1=6
6^2=.36
6^3=..16
6^4=...96
6^5=....76
6^6=...........56
6^7=.............36
6^8=,..............16
6^9=...............96
6^10=...............76
6^11=.................56
6^12=..................36
6^13=.....................16
6^53=....................16
6^53=(6^5)10×6^3=.................16
12^0=1
5^34+6^53-12^0=............25+.................16-1=............41-1=.....................................40
У -3х=0
у=3х
у=3х,х€R
y=6х+х
у=-5х
у=-5х,х € R
1) 1-sin^{2}a+ctg^{2}a*sin^{2}a=cos^{2}a+cos^{2}a/sin^{2}a*sin^{2}a=cos^{2}a+cos^{2}a=2cos^{2}a
2) (sina/cosa*cosa)^{2}+(cosa/sina*sina)^{2}=sin^{2}a+cos^{2}a=1
X^2+10x+25-x^2+2x-1=82
12x=58
x=4 5/26