Question

t1=4,tn=28,Sn=64,n=?​

Answer 1

$Answer\neq is\neq in\neq the\neq figure\\Please \neq mark\neq me\neq as\neq BRAINLIEST\neq ANSWER$

Answer 2

Answer:

For an A.P., if t1 = 4, tn = 28, Sn= 64, find n. Get the answers you need, now!

22 votes

a = 4 = t1 tn=4+(n-1)d=28 (n-1)d=24 Sn=64=n/2(2×a+(n-1) d) =>128=n(8+(n-1)d) =>128=n(8+24) ...  More

6 votes

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13-Mar-2021 · 1 answer

ahlukileoi and 10 more users found this answer helpful. Thanks 5. 5.0. (5 votes). Log in to add