Question

for a given A. P. , t5= 20, d=4 then a is --------?​

Answer 1

Answer:

Heyy ...

Step-by-step explanation:

t5= 20, d= 4 , a = ?

by using formula,

tn = a + (n-1)d

t5 = a + (5-1) 4

20= a + (4)4

20 = a + 8

a = 20-8

a = 12

HOPE IT HELPS YOU..!!

Answer 2

OR

using formula,

tń=a+(n-1)d

t5=a+(5-1)4

20=a+(4x4)

20=a+16

a=20-16

a=4

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