Question

1. How many terms are there in
the A.P. 1, 3, 5, ....73,75?*
HER
O (a) 28
O (b) 30
O (c) 36
O (d) 38​

Answer 1

Step-by-step explanation:

75 = 1 + (n-1)2

74 = 2(n-1)

37 = n - 1

n = 38

There are 38 terms in this A.P.

Answer 2

Answer:

d. 38

Step-by-step explanation:

Given,

First term a = 1

Common difference = 2

Last term Tn= 75

We know that,

tn = a + (n - 1) * d

75 = 1 + ( n - 1 ) * 2

75 -1 = (n-1) * 2

74 / 2 =  (n-1)

37 = n - 1

n = 37 + 1 = 38.

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