Question

If sum of first five terms of A.P is 35 and first term is
3 than find last term​

Answer 1

Answer:

S5=n/2+(a+an)

35=5/2+(3+an)

(70-5)/2=3+an)

65/2-3=an

an=(65-6)/2

an=61/2

an=30.5

Answer 2

Step-by-step explanation:

• sum of first five terms of AP. is 35
• Sn=35
• first term of ap is a=3
• last term is an=?

wkt sum of first n terms in ap is

• Sn=n(a +an)/2
• for first five terms
• 35=5(3+an)/2
• 70=5(3+an)
• 14=3+an
• an=11
• the last term is 11

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