For an A.P , if t₈ = 36 , then S₁₅ =
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0
Answer:
540
Step-by-step explanation:
t8 = 36 = a + 7d then
let us assume a = 1 then d = 5 ( because it makes 'd ' rational value)
let us check 1,1+5,6+5,11+5,16+5,21+5,26+5,31+5,36+5
it is correct
then t15 = 1 + (14*5)
t15 = 71
sum s15 = 15(1+71)/2
= 15 * 36
540
Answered by
0
a+7d=36
Sum=n/2[2a+(n-1)d]
540
Explanation below
Sum=n/2[2a+(n-1)d]
540
Explanation below
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