3+2-5/6+6*4*180%+82=?
2 3 4 5 6=6
1-2-3-4-5-6-7-8-9-10-•••••R
1+2a+3a^2+4a^3+5a^4+6a^5+5a^6+4a^7+3a^82a^9+a^10
7x-5/4=3/82x-1/6=5x+1/81/2x-7=9x-2/62x+1/3-5x-1/6=13/10(200+
求规律:1+2+3+4+5+6+7=规律 101+102+103+104+105+= 77+78+79+80+81+82
5+6+4+3-2=?
1+2+3+4+5+6=
1+2-3+4-5+6=
(1+1/3+1/5+1/10+1/15+1/30)/(1/2+1/4+1/6+1/12+1/20+1/60)=R
如图,若角2=角6,则___平行于___,如果角3+角4+角5+角6=180°,那么.
如图,若∠2=∠6,则()‖(),若∠3+∠4+∠5+∠6=180°,那么
6+6sin(4x)=3 [-5,-2]