Math, asked by nityanivdunge, 11 months ago

find the sum of first four terms of AP with general term tn=(5-2n)​

Answers

Answered by sanketj
1

 t_{n} = 5 - 2n \\  \\  t_{1} =  5 - 2(1) = 3 \\  t_{2} = 5 - 2(2) = 1 \\  t_{3} = 5 - 2(3) =  - 1 \\  t_{4} = 5 - 2(4) =  - 3

Hence, sum of the first four terms

= 3 + 1 + (-1) + (-3)

= 3 + 1 - 1 - 3

= 0

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