Question

For an given A.P., t7 = 4, d = –4 then a = ​

Answer 1

Answer:

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Step-by-step explanation:

● Answer -

(D) a = 28

● Explanation -

# Given -

d = -4

t7 = 4

a = ?

# Solution -

nth term in AP is given by -

tn = a + (n-1)d

Now putting, t7=4, n=7 & d=-4

t7 = a + (7-1)(-4)

4 = a - 24

a = 4 + 24

a = 28

Therefore, value of first term must be 28.

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Answer 2

Step-by-step explanation:

t7= a + (n-1) d

4= a+ (7-1)-4

find a

I don't have calculator right now so

do simplify yourself