Question

given a=5, d=3, an=50, find n and s
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Answer 1

Answer:

I only know the answer of n is 10

Step-by-step explanation:

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Answer 2

Answer:

ANSWER

Given, a=5,d=3,a

n=50

⇒a+(n−1)d=50

⇒5+(n−1)3=50

⇒5+3n−3=50⇒3n=48⇒n=16

∴S =16

= 16

[2a+(16−1)d]=8[2×5+15×3]=440

Hence, n=16,

S 16

=440