Question

Find the common difference and first term of tn =4-7n
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Answer 1

Here is your answer.....

tn = 4 - 7n

put n = 1

t1 = 4 - 7

t1 = -3

therefore the first term of AP is -3

then put t = 2

t2 = 4 - 14

t2 = -10

2nd term is given by t2 - t1

= -10 + 3

= -7

then the common difference will be...

2nd term - 1st term

= -7 + 3

= -4

hope this will help you...

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