Math, asked by ak743951p39ug3, 1 year ago

find the find the sum of n terms of an ap where n term is given by TN is equals to 3 minus 5 n

Answers

Answered by sanjeevankindo99
1
First term of the AP is: 7–3(1) = 4

Second term is: 7–3(2)=1

Thus common difference is: second term- first term = 1–4 = -3

Therefore, the required sum= 25/2 [ 2*4 + (25–1)*-3]

On solving, we get, -800

Hence, the required sum is -800.

:)

Adnamika1: Good
Answered by Adnamika1
0

:The first term of AP is :7-3 (1) 4
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