Question

in an A.P.if S3=24 S4=39 ihe find a4
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Answer 1

Answer:

please Mark as brilliant answer

Answer 2

Given:

★S3 = 24.

★S4 =39

To Find:

★a4

Answer:

S3 =24.

S4 =39.

.°. S1 =S4-S3 =39-24= 15

General formula for sum of series

→ Sn = n/2[a+(n-1)d]

=>S1 =1/2[a+(1-1)d]

=>S1 =1/2×a

=>15 =a/2

.°. a =30.