Question

1. Find k if 10, k. -2 are in AP
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Answer 1

Answer:

4

Step-by-step explanation:

10,-2 . .

,

-10 = -2-

+ = 10 - 2

2 = 8

= 4

Answer 2

Answer:

4

Step-by-step explanation:

Let a₁,a₂,a₃,.....aₙ be the terms of an AP

In an AP a₂-a₁=a₃-a₂

Here a₁=10, a₂=k, a₃=-2

Using the above relation→

k-10 = -2-k ⇒ 2k=8 ⇒ k=4