Question

Find n
given a = 5, d = 3, a, = 50, find n and s​

Answer 1

Given :

• Tn = 50
• a = 5
• d = 3

To Find :

• value of n
• Sn

Solution :

We know, Tn = a + (n - 1)d

ATQ,

Tn = 50

a + (n - 1)d = 50

5 + (n - 1)3 = 50

n = (50 - 5)/3 + 1

•°• n = 16

And, Sn = n/2 × [2a + (n - 1)d]

Thus, Sn or S16 = 16/2 × [(2 × 5) + (16 - 1)3]

S(16) = 8 × (10 + 45)

S(16) = 440

•°• Sn = 440

Answer 2

Answer:

very good question

Step-by-step explanation:

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