Question

which term of the A.P 4,7,10---is 64​

Answer 1

Answer:

21

Step-by-step explanation:

a=4

d=3

an = 64

an=a+(n-1)d

64=4+(n-1)3

n-1=60/3

n-1=20

n=21

Answer 2

$\huge\underline\bold\color{red}\mathfrak{Answer}$

a = 4

d = 7-4 = 3

An = 64

n =?

We know that,

An = a + (n-1)d

Substituting the values,

64 = 4 + (n-1)3

64 - 4 = (n-1)3

60/3 = n-1

20 = n - 1

n = 20+1

n = 21

21st term of the AP is 64.

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