Question

In an Arithmetic progression, if d= -4, n=7, an=4, then find a.​

Answer 1

Answer:

By formula ,,

a + ( n - 1 ) d = an

a + (7 - 1) -4 = 4

a + (6) -4 = 4

a + -24 = 4

=>=> a = 28 <=<=

Step-by-step explanation:

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Answer 2

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Given:

• Arithmetic Progression
• d = -4, n = 7, a$_n$ = 4

To Find:

• Value of a

Solution:

We know that,

$a_n = a + (n - 1)d \\\implies 4 = a + (7 - 1)(-4) \\\implies 4 = a + 6*(-4) \\\implies 4 = a - 24 \\\implies a = 4 + 24 \\\bf{\implies a = 28}$

Formula Used:

• $a_n = a + (n - 1)d$

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