4)" For an "A*p,quad " find "S_(7)" if "a=5" and "d=4

For an A.P., find S_(12) if a=4 nd d=3.

For an A.P., find S_(12) if a=4 nd d=3.

For an A.P. if t_(7)=4.d=-4 .then a=…..

Find S_(5) of the A.P. 8,6,4,….

(i) Given a G.P. with a=729 and 7th term 64 find S_(7) . (ii) If {a_(n)} is a G.P. and a_(1)=4,r=5 , find a_(6) and S_(6) .

If P(4,7), Q(7,2) R(a,b) and S(3,8) are the vertices of a parallelogram then find the value of a and b.

From the following in which pair of orbitlas have more attraction with nucleus (i) 4f and 5d (ii) 4d and 5 s (iii) 7s and 5 f , (ii) 7p and 5p ( v) 3d and 3f

If A(-5,\ 7),\ B(-4,\ -5),\ C(-1,\ -6)\ a n d\ D(4,\ 5) are the vertices of a quadrilateral, find the area of the quadrilateral ABCD.

For a G.P. if S_5 =1023, r=4, find a

If p:q=5:7 and p-q=-4 then find the value of 3p+4q.