Question

tn=7-4n find common difference
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Answer 1

Answer:

-4

Step-by-step explanation:

Given:

Tn = 7-4n

So, First term = 7-4(1) = 7-4 = 3      {n=1 , as tn represents the nth term value}

Similarly, Second term = 7-4(4) = 7-8 = -1      {n=2}

We, now that First term - Second term = common difference  or a₂ - a₁ =d

∴ (-1) - (3) = -1 -3 = -4  {Your common difference :-)}

There is another method also!!

If Tn is a linear expression then the coefficient of n is the common difference!!

Here, you can see that Tn = (7 - 4n) or -(4n +7) is a linear expression.

And coefficient of n = -4

So, Common difference = -4

Hope, you got both the method :-))

Please, mark it as brainiest!!