If `-2,4,10,...` are in `A.P` then `s_(21)`=

Check 2,4,6,8,10 are in A.P or not

Find K if 10,K,-2 are in A.P.

S_n in A.P.=

Let S_(1) be the sum of the first n terms of the A.P 8,12,16,... and let S_(2) be the sum of the first n terms of the A.P 17,19,21,... assume n!=0 then S_(1)=S_(2) for

If the roots of x^4 -2x^3 - 21x^2 + 22 x + 40 =0 are in A.P then the roots are

If the roots of x^(4) - 2x^(3) - 21x^(2) + 22x + 40 = 0 are in A.P. then the roots are

If the roots of x^(4) - 2x^(3) - 21x^(2) + 22x + 40 = 0 are in A.P. then the roots are

If a_(1),a_(2),a_(3)............ are in A.P. such that a_(4)-a_(7),+a_(10)=m, then sum of 13 terms of this A.P., is;

The sequence -10,-6,-2,2,….. a)is an A.P, Reason d=-16 b)is an A.P, Reason d=-4 c)is an A.P, Reason d= 4 d)is not an A.P.