= -2d - 3
Chat with our AI personalities
If 16 - 7d = -3 d + 2, collecting like terms with "d" on the left side yields -4d = -14, or d = 14/4 = 7/2.
The given sequence is an arithmetic progression with common difference d = 4 and first term a = 3.Sum of n terms of an A.P. is given by: Sn = n/2 x [2a + (n-1)d]We need to find sum of 11 terms so n = 11.Putting value of n, a and d we get:S11 = 11/2 x [2x3 + (11 - 1) x 4]S11 = 11/2 x [6 + 40]S11 = 11/2 x 46 = 11 x 23 = 253
-11
D=26.
What is 2 plus d