The first term of an AP is -7 and the ratio of the eight term to the third term is 7:1 calculate the common difference

the common difference is 6.

Step-by-step explanation:

Given;

first term of an AP, a = -7

let the common difference = d

The third term is written as;

T₃ = a + 2d

The eight term is written as;

T₈ = a + 7d

The ratio of the eight term to third term = 7:1

Therefore, the common difference is 6.

4th option is correct xy=-10

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1) is right

step-by-step explanation: