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If 18,a,b,-3 are in AP, then a+b=...

If `18,a,b,-3` are in AP, then `a+b=`

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State 'T' for true and 'F' for false . I. A sequence is an A.P ., if and only if the sum of its n terms is of the form An^(2) +Bn , where A and B are constants . II. If 18, a, b , -3 are in A.P., then a+b = 15 . III If a,c,b are in A.P., then 2c=a+b . IV .The n^(th) term from the end of an A.P. is the (m-n+1)^(th) term from the beginning , where m terms are in A.P.

If 18, a, (b-3) are in AP, then find the value of (2a-b).

if a, b,c are in A.P. then b =

If a,b,c are in AP then b-a = …………..

If a,b,c are in AP then 2b = ………….

If 18 ,\ a ,\ b ,\ -3 are in A.P., the a+b= (a) 19 (b) 7 (c) 11 (d) 15

If 18 ,\ a ,\ b ,\ -3 are in A.P., the a+b= (a) 19 (b) 7 (c) 11 (d) 15

If a,b,c are in A.P., the 3^(a), 3^(b) , 3^(c ) are in :

If a,b,c are in A.P .then 3^a , 3^b and 3^c are in

If a, b, c are in A.P. then 3^a, 3^b, 3^c are in: