Объяснение:
1) a1=7 d=3 ;
a1=7;
a2=a1+(n-1)*d=7+(2-1)*3=10;
a3=7+2*3=13;
a4=7+3*3=16;
a5=7+4*3=19;
a6=7+5*3=22;
***
2) a1=1,3, d=-0,2.
a1=1.3;
a2= 1.3+1*(-0.2)=1.1;
a3=1.3+2*(-0.2)=0.9;
a4=1.3+3(-0.2)=0.7;
a5=1.3+4*(-0.2)=0.5;
a6=1.3+5*(-02)=0.3;
3) a1=2,5 d=0,7
a1=2.5;
a2=2.5+1*0.7=3.2;
a3=2.5+2*0.7=3.9;
a4=2.5+3*0.7=4.6;
a5=2.5+4*0.7=5.3;
a6=2.5+5*0.7=6.0;
4) a1=2/7 d=1/3 ;
a1=2/7;
a2=2/7+1*1/3=13/21;
a3=2/7+2*1/3=20/21;
a4=2/7+3*1/3=2/7;
a5=2/7+4*1/3=1 13/21;
a6=2/7+5*1/3=1 20/21.
Объяснение:
1) a1=7 d=3 ;
a1=7;
a2=a1+(n-1)*d=7+(2-1)*3=10;
a3=7+2*3=13;
a4=7+3*3=16;
a5=7+4*3=19;
a6=7+5*3=22;
***
2) a1=1,3, d=-0,2.
a1=1.3;
a2= 1.3+1*(-0.2)=1.1;
a3=1.3+2*(-0.2)=0.9;
a4=1.3+3(-0.2)=0.7;
a5=1.3+4*(-0.2)=0.5;
a6=1.3+5*(-02)=0.3;
***
3) a1=2,5 d=0,7
a1=2.5;
a2=2.5+1*0.7=3.2;
a3=2.5+2*0.7=3.9;
a4=2.5+3*0.7=4.6;
a5=2.5+4*0.7=5.3;
a6=2.5+5*0.7=6.0;
***
4) a1=2/7 d=1/3 ;
a1=2/7;
a2=2/7+1*1/3=13/21;
a3=2/7+2*1/3=20/21;
a4=2/7+3*1/3=2/7;
a5=2/7+4*1/3=1 13/21;
a6=2/7+5*1/3=1 20/21.