Question

.In an A.P ,if t₃ = -1 and t₄ =-6, then d=______​

Answer 1

Answer:

-6-(-1)

= -6+1

=-5

therefore d= -5

Step-by-step explanation:

Hope this will help you

Answer 2

t3= -1

t3= t+(n-1)d = t + 2d

-1= t + 2d -----eq. 1

t4= -6

t4=t+(n-1)d = t+ 3d

-6= t+ 3d ------eq.2

Solve eq 1 and 2 by method that suits you. (Elimination or Substitution or Cross-multiplication)

After solving we get,

t = 9 and d= -5

Answer:

d= -5