Question

a=5,d=3,an=50 . find n=_​

Answer 1

Answer:

An=50

a+(n-1)d=50

5+(n-1)3=50

3n-3=50-5

3n=50+3-5

3n=48

n=48/3

n=16

sn=n/2 (2a+n

Step-by-step explanation:

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Answer 2

Answer:-

Given:-

$\small\sf{a=5}$

$\small\sf{d=3}$

$\small\sf{an=50}$

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$\small\sf{an=a+(n-1)d}$

$\small\sf{50=5+(n-1)3}$

$\small\sf{50=5+3n-3}$

$\small\sf{50=2+3n}$

$\small\sf{50-2=3n}$

$\small\sf{48=3n}$

$\small\sf{n=\frac{48}{3}}$

$\small\sf{n=16}$