Question

middle term of the A.p:4,7,10...154 is​

Answer 1

a = 4

d = 3

an = 118

\tt{an = a + [ n - 1 ] d}

✓ 118 = 4 + [ n - 1 ] 3

✓ 114 = [ n - 1 ] 3

✓ n - 1 = 38

✓ n = 39

Now , n is odd thus , middle term = [ n + 1 ] / 2

✓ n = [ 39 + 1 ] / 2

✓ n = 20

✓ nth term = 4 + 19 × 3 ________ an = a + [ n - 1 ] d

✓ nth term = 4 + 57

Step-by-step explanation:

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